Is there a program i can use that will clean up files for me and delete old items like cookies and cache?
Go to your App Store and download CCleaner.
I use it once in a while to clean up my browsing history, logs and cache files.
Several good ones you can try:
Lion Cache Cleaner 6.0.11
TinkerTool System 2.9.1
Choose one to use as you don't need to use all four of them. My personal favorites are the first two.
what files whould i delete and all that?
Delete cache files and cookies is a good start.
The utilities do that for you. Usually start with cache files, log files, and unneeded temp files.
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