Battery life about 2 hours from a full charge

Question

I ran an EtreCheck and see a lot of problems but am not sure how to deal with them. Any help would be appreciated!
Hardware Information:
          MacBook Air (13-inch, Mid 2012)
          MacBook Air - model: MacBookAir5,2
          1 1.8 GHz Intel Core i5 CPU: 2 cores
          4 GB RAM
Video Information:
          Intel HD Graphics 4000 - VRAM: 512 MB
System Software:
          OS X 10.8.5 (12F45) - Uptime: 13 days 6:24:15
Disk Information:
          APPLE SSD SM256E disk0 : (251 GB)
                    disk0s1 (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) /: 250.14 GB (7.14 GB free) (Low!)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
USB Information:
          Apple Inc. FaceTime HD Camera (Built-in)
          Apple Internal Memory Card Reader
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Inc. BRCM20702 Hub
                    Apple Inc. Bluetooth USB Host Controller
FireWire Information:
Thunderbolt Information:
          Apple Inc. thunderbolt_bus
Kernel Extensions:
Problem System Launch Daemons:
          [failed] com.apple.wdhelper.plist 3rd-Party support link
Problem System Launch Agents:
          [failed] com.apple.accountsd.plist 3rd-Party support link
          [failed] com.apple.CalendarAgent.plist 3rd-Party support link
          [failed] com.apple.coreservices.appleid.authentication.plist 3rd-Party support link
          [failed] com.apple.lookupd.plist 3rd-Party support link
          [failed] com.apple.pbs.plist 3rd-Party support link
          [failed] com.apple.printtool.agent.plist 3rd-Party support link
          [failed] com.apple.printuitool.agent.plist 3rd-Party support link
Launch Daemons:
          [loaded] com.adobe.SwitchBoard.plist 3rd-Party support link
          [loaded] com.oracle.java.Helper-Tool.plist 3rd-Party support link
Launch Agents:
          [not loaded] com.adobe.AAM.Updater-1.0.plist 3rd-Party support link
          [loaded] com.oracle.java.Java-Updater.plist 3rd-Party support link
User Launch Agents:
          [loaded] com.adobe.AAM.Updater-1.0.plist 3rd-Party support link
          [loaded] com.google.keystone.agent.plist 3rd-Party support link
          [loaded] com.valvesoftware.steamclean.plist 3rd-Party support link
User Login Items:
          Flux
          iTunesHelper
          Flux
          Flux
          Steam
          Quicksilver
          Alfred
          Dropbox
          CrossOver CD Helper
Internet Plug-ins:
          Silverlight: Version: 5.1.20913.0 - SDK 10.6 3rd-Party support link
          QuickTime Plugin: Version: 7.7.1
          Unity Web Player: Version: UnityPlayer version 4.1.5f1 3rd-Party support link
          JavaAppletPlugin: Version: Java 7 Update 25 Outdated! Update
Audio Plug-ins:
          AirPlay: Version: 1.7 - SDK 10.8
          iSightAudio: Version: 7.7.1 - SDK 10.8
3rd Party Preference Panes:
          Application Enhancer  3rd-Party support link
          Java  3rd-Party support link
Bad Fonts:
          None
Old Applications:
          Audacity:          Version: 2.0.2.0 - SDK 10.4 3rd-Party support link
                    /Applications/Audacity/Audacity.app
          Unity Bug Reporter:          Version: 4.1.5f1 - SDK 10.4 3rd-Party support link
                    /Applications/Unity/Unity Bug Reporter.app
Time Machine:
          Time Machine not configured!
Top Processes by CPU:
              16%          DashboardClient
               2%          WindowServer
               2%          VLC
               2%          EtreCheck
               1%          mds
Top Processes by Memory:
          2.19 GB          DashboardClient
          79 MB          Google Chrome
          41 MB          Quicksilver
          29 MB          EtreCheck
          20 MB          WindowServer
Virtual Memory Information:
          75 MB          Free RAM
          1.43 GB          Active RAM
          1.36 GB          Inactive RAM
          1.14 GB          Wired RAM
          125.64 GB          Page-ins
          37.31 GB          Page-outs

Answer 1

Ouch,  #2 and #3 are the 600 pound Gorilla that "sat" on your battery 
Contact Apple for appt. for free in shop diagnostics and obvious battery replacement
future battery considerations:
Gaming: In cases of heavy and frequent use in gaming it is recommended, if possible, to keep your Mac plugged in since these frequent fast and deep discharges of the battery are not ideal for battery longevity.
If you were to always keep your macbook battery floating between 20% and 80% charge roughly, then you’d have no other considerations to make about your battery and its care,… except for long-term storage.
Keep it plugged in when near a socket so you keep the charging cycles down on your LiPo (lithium polymer) cells / battery, but not plugged in all the time. When not being used for several hours, turn it off.
http://www.apple.com/batteries/notebooks.html
"Apple does not recommend leaving your portable plugged in all the time."
General rule to remember of Lithium batteries is:
Never drain them LOW  & dont always/often store them HIGH
While cycle count is commonly seen to be the “miles” on your Lithium Ion pack cell in your Macbook, which they are, this distinction is not a fine line at all, and it is a big misconception to “count charge cycles”
*A person who has, for example, 300 charge cycles on their battery and is recharging at say 50-60% remaining of a 100% charge has better battery usage and care than another person who has 300 charge cycles at say 15% remaining on a 100% charge. 
DoD (depth of discharge) is far more important on the wear and tear on your Macbook battery than any mere charge cycle count.  *There is no set “mile” or wear from a charge cycle in general OR in specific.    As such, contrary to popular conception, counting cycles is not conclusive whatsoever, rather the amount of deep DoD on an averaged scale of its use and charging conditions.
                          (as a very rough analogy would be 20,000 hard miles put on a car vs. 80,000 good miles being something similar)
*Contrary to some myths out there, there is protection circuitry in your Macbook and therefore you cannot overcharge it when plugged in and already fully charged
*However if you don’t plan on using it for a few hours, turn it OFF (plugged in or otherwise) ..*You don’t want your Macbook both always plugged in AND in sleep mode       (When portable devices are charging and in the on or sleep position, the current that is drawn through the device is called the parasitic load and will alter the dynamics of charge cycle. Battery manufacturers advise against parasitic loading because it induces mini-cycles.)
Keeping batteries connected to a charger ensures that periodic "top-ups" do very minor but continuous damage to individual cells, hence Apples recommendation above:   “Apple does not recommend leaving your portable plugged in all the time”, …this is because “Li-ion degrades fastest at high state-of-charge”.
                    This is also the same reason new Apple notebooks are packaged with 50% charges and not 100%.
LiPo (lithium polymer, same as in your Macbook) batteries do not need conditioning. However...
A lot of battery experts call the use of Lithium cells the "80% Rule" ...meaning use 80% of the charge or so, then recharge them for longer overall life.
Never let your Macbook go into shutdown and safe mode from loss of power, you can corrupt files that way, and the batteries do not like it.
The only quantified abuse seen to Lithium cells are instances when often the cells are repeatedly drained very low…. key word being "often"
Contrary to what some might say, Lithium batteries have an "ideal" break in period. First ten cycles or so, don't discharge down past 40% of the battery's capacity. Same way you don’t take a new car out and speed and rev the engine hard first 100 or so miles.
Proper treatment is still important. Just because LiPo batteries don’t need conditioning in general, does NOT mean they dont have an ideal use / recharge environment. Anything can be abused even if it doesn’t need conditioning.
From Apple on batteries:
http://support.apple.com/kb/HT1446
http://www.apple.com/batteries/
Storing your MacBook
If you are going to store your MacBook away for an extended period of time, keep it in a cool location (room temperature roughly 22° C or about 72° F). Make certain you have at least a 50% charge on the internal battery of your Macbook if you plan on storing it away for a few months; recharge your battery to 50% or so every six months roughly if being stored away. If you live in a humid environment, keep your Macbook stored in its zippered case to prevent infiltration of humidity on the internals of your Macbook which could lead to corrosion.
Considerations:
Your battery is subject to chemical aging even if not in use. A Lithium battery is aging as soon as its made, regardless.
In a perfect (although impractical) situation, your lithium battery is best idealized swinging back and forth between 20 and 85% SOC (state of charge) roughly.
Further still how you discharge the battery is far more important than how it is either charged or stored short term, and more important long term that cycle counts.
Ultimately counting charge cycles is of little importance.  Abuse in discharging (foremost), charging, and storing the battery and how it affects battery chemistry is important and not the ‘odometer’ reading, or cycle counts on the battery. 
Everything boils down to battery chemistry long term, and not an arbitrary number, or cycle count.
Keep your macbook plugged in when near a socket since in the near end of long-term life, this is beneficial to the battery.
Peace