MacBook Pro RAM upgrade to 8GB

For a more objective read on whether you need more RAM, do the following:

Use your computer as you normally do for a few days, allowing it to sleep overnight instead of shutting it down — there is very seldom any real need to shut it down. After at least three days of use for all the tasks that you would expect to do on it with upgraded RAM, open Activity Monitor. Click the Memory tab at the bottom of the window. Compare the numbers shown for Page Ins and Page Outs. If Page Outs are more than about 10% of Page Ins, your computer's performance could benefit significantly from more RAM. The closer the two numbers are, the greater the benefit will be. If Page Outs are less than 10% of Page Ins, the benefit will be small, probably too small to justify the cost of a RAM upgrade. 8GB RAM upgrades started at about $275 last time I checked, a couple of weeks ago.