Well i don't personally recommend you tell them flat out no everytime. Because that is pretty rude. I recommend you only let them use it when they actually have a good reason to use it. If your friend asks "Hey can i check my facebook? I want to see if i heard back from soandso" don't be afraid to say no. That you aren't completely comfortable with your computer being used by other people all the time and that if they want to check that stuff at school they should save up for a laptop of their own. Now if someone has something important to show the other people in your art club or something like that, then you probably should so let them use it so that you aren't being too rude. Or better yet, do it for them. It is on their flash drive? Pull it up yourself, no need to hand the computer to them. To sum up: don't be afraid to say "no", but don't be to rude in important situations. If they get on your case a lot, tell them to back off, get their own and see how they like it when everyone always harasses them to use it for nonsensical stuff.

Well, i just deleted my Last.fm account. Anyone else?