How to speed up sluggish MacBook?
my macbook is lagging reallllly bad, i just got it, and i tried the disk utility feature to erase everything, and yet it still lags horribly and also i do not have the original discs because i am buying them through my school..... it's extremely slow, how can i fix this?

Meh. The software on those things is pretty bad. Better than Windows, but still pretty bad. The following link is all you need:
‘http://ubuntu.com’
But these links provide more info on *why* you need it:
‘http://www.getgnulinux.org/’
‘http://system76.com/articles.php?tPath=2′