Help cleaning old files etc, how ????

[locus]

OK, I know how to clean or empty the browser, but is there anything else I can do or should do ? what I mean is, in Windows I have programs that clean out old files etc, can this be done on the Nexus 1 ? is there an app ? is it needed ? or do I have to reset it to get rid of all the junk, stuff like old files from removed programs etc ?

thanks

 

[Buck Shot]

To clean out browser, the way I do it is, open browser> menu>more>settings > then scroll down and cache. ..etc are all there.