Ways to reduce RAM usage

[ProjectXMark1]

Could anyone give me some help? I'm a bit clueless about reducing my computer's RAM use. I don't want anything too drastic (installing a solid-state drive or more RAM is where I draw the line). I have many files and appilcations that I do not use anymore, I run Windows Vista Home Premium SP2, Intel Core2 Duo 2.8GHz CPU.

[Custard Donut (In Space)]

I remember hearing about an application called Game-booster a year or so ago, i tried it myself but experiencing no noticeable improvement i stopped using it, i have heard some people swear by it's potency though, i think it works by shutting down any non-essential programs while you play.

Anyone else know if game-booster could help? I wouldn't use it on my recommendation alone as frankly i'm not the most knowledgeable on these things.

[lobsterbark]

Gamebooster does not help unless your an idiot, and don't know how to use task manager. I just manually shut down unneeded tasks. Gamebooster actually uses more ram and cpu than it saves.