The more "stuff" you have running, the more system resources are taken up on your computer. It is important to keep track of the processes, programs, and services that load and run in the background each time you boot up. Keeping track of them, and getting rid of those that you don’t need will provide Vista with the maximum possible memory and processor cycles. Vista’s task manager, which comes with even more features than any other version of Windows, is a great tool to use for this purpose.