Mac OS-X looks like a fuzzy-warm® place to be, but underneath all that designer fur is the UNIX computer operating system. This is a good thing. Without that, Macs would be history by now instead of rapidly gaining market share.
One of the things UNIX does is write everything down. "It's 9PM and droo09 just restarted me." "It's 9:30PM and droo09 just connected a USB drive." "It's 10:00pm and droo09 just ate a greasy, cold cheeseburger. Ewwwwwwwww!"
Sooner or later, all those electronic Post-Its start to clog up the system.
If you leave your computer running and wide awake all the time, it will clean up after itself--usually at around 4:00AM. It collects all those notes, compresses them and piles them all into a shoe box in the garage.
It does all these tools
periodically. If your computer goes to sleep when you do, then those jobs never get done.
You can download a free program called MacJanitor and you can tell it when you want it to clean up for you.
http://www.versiontracker.com/dyn/moreinfo/macosx/10491
You don't need MacJanitor. You can do this with your own fingers, but there's no pictures to help out. So if you're up to it...
Open a terminal. Applications > Utilities > Terminal
It should open up with something like this...
Last login: Thu Dec 25 19:47:11 on console
Welcome to Darwin!
jimmy:~ koz$
Then you type the commands in. It will look like this
Last login: Thu Dec 25 19:47:11 on console
Welcome to Darwin!
jimmy:~ koz$ sudo periodic daily weekly monthly [return]
[return] means press the return or enter key.
Password:
After you put your password in, the computer may grind for up to an hour--especially if you have never done it before.
When the prompt comes back, APPLE-Q quit Terminal.
After that, you can do it once a week and it won't take nearly that long. You can also tell people that you know how to run programs on your Mac from the command line.
Koz