Adding more RAM to your system can be one of the cheapest, most effective ways of increasing overall performance. But if your machine is maxed out, or cracking open your case and inserting new hardware is beyond you, a memory optimizing app is a good way to make sure you’re making the best use of the RAM you have.
Install the freeware FreeRAM XP Pro, and it will free up and optimize RAM based on your system specs with one click. Run it at startup, and it’ll do a decent job of keeping you RAM resources in order without you ever having to think about it again. And if you’re the tweaking type, there are a fair amount of options in the Settings section for manually freeing RAM and displaying virtual memory and CPU usage.