Well I'm going to tell you guys how to keep some space on your computer to make it have more room.

Keep you recycle bin empty.
Remove programs you rarely use do not remove the programs the computer comes with because you might mess it up.
Don't get programs that take up a lot of space like 8 GB.

Less items > more room.

CCleaner can keep your computer faster by deleting cookies and crap like that.
It can also clean up your registry. This will make your computer run faster.

360Amigo System Speedup is quite good.