hello... i recently purchased my first Mac! I've always been a PC user and finally got sick all the viruses and error messages, so I sold my dell, shelled out a little cash, and got the following: MB (white) 2.0 ghz 1gB Ram 100g harddrive so far, i'm loving every bit of it! no problems (though it does seem to run rather warm, but from i understand, this is normal for macbooks) other than like two or three times where an application "quit unexpectedly". my question is this- i normally just shut the lid to let it sleep when i'm not using it (normally, the most i will go without using it is about 8 or 9 hours while i'm at work), even when i carry it somewhere, i'll just shut the lid and let it sleep... the manual says shut it down when i will go without it for a few days... so... am i ok by just letting it sleep everytime? or should i shut it down every once in a while? thanks!