Advice: How to speed up Macbook Air (2010)

Under Lion my 2010 (HDD) Macbook Air has been intolerably slow. It could take 10 minutes to start a program. When connecting to a projector, it could likewise take 10 minutes for it to resize windows during which it was unresponsive. I have been about to hurl it in the trashcan because this computer was just such an impediment to my work. But now I found the solution: don't run Safari. I had long suspected 2G ram combined with a slow HDD was the culprit. I tried to minimize the number of programs open, but let Safari run permanently. But it turns out Safari uses enormeous amounts of memory, and it has a tendency to just grow and grow its memory grab. Now, I quit Safari when I want to run other programs, and after this the computer is merely slow, not intollerably so. It is annoying to always have to quit Safari, but at least it makes the computer useful.
Any better suggestions than always quitting Safari?

The fact is that Mac OS X is good at of taking care of itself, if there are performance issues, there are a couple of things you can check:
Check your Login Items under System Preferences > Accounts to see what you have automatically launching.Also check /Library/LaunchAgents/ and /Users/yourusername/Library/LaunchAgents/ for items launching at startup
Launch Activity Monitor and change "My Processes" at the top to "All Processes". Then see what may be consuming your OS X system resources.
Check the System Memory tab at the bottom of Activity Monitor to see if you have excessive "page outs", a sign that you may benefit from more RAM.
Check if you are running any poor Mac anti-virus programs as they may take large resources.
If you don't want to do these manually or the above checks still won't help, let the MacBook speed up tool http://www.speedupmacbook.com/ perform a health check of your Mac and fix relevant issues.
Best regards!

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    Click the [Click for details] links for more information about that line.
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        1 2.13 GHz Intel Core 2 Duo CPU: 2-core
        4 GB RAM Not upgradeable
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            BANK 1/DIMM0
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        Bluetooth: Old - Handoff/Airdrop2 not supported
        Wireless:  en0: 802.11 a/b/g/n
        Battery Health: Normal - Cycle count 336
    Video Information: ℹ️
        NVIDIA GeForce 320M - VRAM: 256 MB
            Color LCD 1440 x 900
    System Software: ℹ️
        OS X 10.10.2 (14C109) - Time since boot: 2 days 2:11:3
    Disk Information: ℹ️
        APPLE SSD TS256C disk0 : (251 GB)
            EFI (disk0s1) <not mounted> : 210 MB
            Untitled (disk0s2) / : 250.14 GB (82.89 GB free)
            Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
    USB Information: ℹ️
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        Apple Internal Memory Card Reader
        Apple Inc. BRCM2070 Hub
            Apple Inc. Bluetooth USB Host Controller
        Apple Inc. Apple Internal Keyboard / Trackpad
    Gatekeeper: ℹ️
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            /Applications/Seil.app
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            /Library/Application Support/VirtualBox
        [loaded]    org.virtualbox.kext.VBoxDrv (4.3.22) [Click for support]
        [loaded]    org.virtualbox.kext.VBoxNetAdp (4.3.22) [Click for support]
        [loaded]    org.virtualbox.kext.VBoxNetFlt (4.3.22) [Click for support]
        [loaded]    org.virtualbox.kext.VBoxUSB (4.3.22) [Click for support]
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        [killed]    com.apple.CallHistoryPluginHelper.plist
        [killed]    com.apple.CallHistorySyncHelper.plist
        [killed]    com.apple.coreservices.appleid.authentication.plist
        [killed]    com.apple.telephonyutilities.callservicesd.plist
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        [loaded]    org.gpgtools.macgpg2.fix.plist [Click for support]
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        [loaded]    com.google.keystone.daemon.plist [Click for support]
        [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
        [loaded]    net.sourceforge.MonolingualHelper.plist [Click for support]
        [loaded]    org.gpgtools.gpgmail.patch-uuid.plist [Click for support]
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        googletalkbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
        QuickTime Plugin: Version: 7.7.3
        JavaAppletPlugin: Version: Java 8 Update 31 Check version
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        Default Browser: Version: 600 - SDK 10.10
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        Picasa: Version: 1.0 - SDK 10.6 [Click for support]
        Dashlane: Version: Dashlane 1.0.0 - SDK 10.10 [Click for support]
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        GPGPreferences  [Click for support]
        Hazel  [Click for support]
        Java  [Click for support]
    Time Machine: ℹ️
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    Top Processes by CPU: ℹ️
            10%    WindowServer
             8%    mds
             7%    Alfred 2
             6%    mds_stores
             6%    Finder
    Top Processes by Memory: ℹ️
        185 MB    Google Chrome
        166 MB    Google Chrome Helper
        96 MB    Finder
        82 MB    Messages
        47 MB    WindowServer
    Virtual Memory Information: ℹ️
        35 MB    Free RAM
        1.32 GB    Active RAM
        1.30 GB    Inactive RAM
        963 MB    Wired RAM
        42.77 GB    Page-ins
        1.12 GB    Page-outs
    Diagnostics Information: ℹ️
        Feb 22, 2015, 11:44:56 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/garcon_2015-02-22-234456_[reda cted].crash
        Feb 22, 2015, 05:28:10 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/garcon_2015-02-22-052810_[reda cted].crash
        Feb 20, 2015, 11:49:00 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/CalendarAgent_2015-02-20-23490 0_[redacted].crash
        Feb 20, 2015, 11:26:45 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/soagent_2015-02-20-232645_[red acted].crash
        Feb 20, 2015, 10:12:01 PM    Self test - passed

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