My Macbook does not feel as snappy as it was when I first got it. I installed/uninstalled many apps and moved lot of files and reinstalled many times my Windows XP partition (at least 4 times), I want to do a fresh reinstall of everything. Are there files that I should save that aren't already on my personnal folders? All my important apps (Adobe suit, Word and Suitcase) are already given and installed by my college and I own no paid apps (I don't download either, btw). Also, once OSX reinstalled, Is there's more that I should do, like reinstalling Apple apps, etc. to be sure that it is in the same state that it was when I first booted it?