Add some RAM
If you want to beef up your machine's ability to multitask, consider installing some RAM, which acts a little like the Tin Man's oilcan to make your machine more nimble when running several programs simultaneously. Use this site to find the right kind of RAM for your particular model, and get cozy with Lifehacker's handy installation guide.
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Joe McGauley is a senior writer for Thrillist and has been using his 2006 iBook as a doorstop for the last few years.