want to clean up MBP

Hi,



I have Snow Leopard Cache Cleaner and have used it many times but I still find that I get the spinning disk a lot more frequently than before. I feel it may be time to "clean" the machine's brain for lack of a better word. ...I'm not a techie, though. Should I be looking at backing up to an external and then doing....something...re-image?? Something else?



I don't have discs to re-install Snow Leopard, which I am used to and like. But maybe whatever is the latest and greatest would be okay?



Suggestions?



thanks.

via ehMac.ca http://www.ehmac.ca/showthread.php?t=115394&goto=newpost