Why does my Macbook Pro battery not even last me 2 hours even just browsing the internet or typing a document?

So my Macbook Pro 2011 that isn't even a year and a half old only lasts me about 2 hours of battery. My brightness is set to only 4 notches most of the time and I mostly have google chrome and itunes or spotify open when I am using it. I have to charge it about 2 times a day. My old original unibody macbook lasted a longer time than this. Today, my fans were running faster than normal and my battery drained 20 percent in less than a half hour.
Here is all of my battery/power info:
Battery Information:
Model Information:
Serial Number:          xxxxxxxxxxxxxxxxxxx
Manufacturer:          SMP
Device Name:          bq20z451
Pack Lot Code:          0
PCB Lot Code:          0
Firmware Version:          406
Hardware Revision:          2
Cell Revision:          158
Charge Information:
Charge Remaining (mAh):          2545
Fully Charged:          No
Charging:          No
Full Charge Capacity (mAh):          6147
Health Information:
Cycle Count:          371
Condition:          Normal
Battery Installed:          Yes
Amperage (mA):          -2085
Voltage (mV):          11092
System Power Settings:
AC Power:
System Sleep Timer (Minutes):          25
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          15
Wake on AC Change:          No
Wake on Clamshell Open:          Yes
Wake on LAN:          Yes
Display Sleep Uses Dim:          Yes
GPUSwitch:          2
PrioritizeNetworkReachabilityOverSleep:          0
RestartAfterKernelPanic:          157680000
Standby Delay:          4200
Standby Enabled:          0
Battery Power:
System Sleep Timer (Minutes):          20
Disk Sleep Timer (Minutes):          0
Display Sleep Timer (Minutes):          15
Wake on AC Change:          No
Wake on Clamshell Open:          Yes
Current Power Source:          Yes
Display Sleep Uses Dim:          Yes
GPUSwitch:          2
Reduce Brightness:          Yes
RestartAfterKernelPanic:          157680000
Standby Delay:          4200
Standby Enabled:          0
Hardware Configuration:
UPS Installed:          No
AC Charger Information:
Connected:          No
Charging:          No
Here is all the processes my mac was running today:
http://pastebin.com/z91Sp3Kk
I would greatly apprecieate any feedback or help that anyone could give me. I don't even do processor intensive tasks so I don't know why my battery isn't lasting me more than 2 hours.
Thank you.

if you look at this process...
39484 Shockwave Flash (Chrome P me 53.5 189.5 MB 1.05 GB
it was using 53.5% of you CPU. Which if used over a long period of time, a lot of battery will be used and it will drain quickly, try figuring out what this is and use it less often, or try deleting it if it is not important.

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Processor: 2.4GHz Intel Core 2 Duo
Memory: 4GB 1067MHz DDR3
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Battery Information (from System Information):
Model Information:
Serial Number:          9G02903MAD3NB
Manufacturer:          DP
Device Name:          bq20z451
Pack Lot Code:          0
PCB Lot Code:          0
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