Drastically Speed up your Linux System with Preload

From Techthrob.com:

Preload is an "adaptive readahead daemon" that runs in the background of your system and observes what programs you use most often, caching them in order to speed up application load time. By using Preload, you can put unused RAM to good work, and improve the overall performance of your desktop system. Best of all, it's easy to install and use!