Taking time out to evacuate your PC's dust bunnies is a must for keeping your computer running in tip-top shape. If you're more the laptop sort, DIY site Instructables details how to banish dust from your laptop.
The more dust that collects inside your computer, the hotter it'll run. The hotter it runs, the sooner it'll die. What's more, that accumulated dust has probably caused your fan to run more often and louder than it needs to. As you can imagine, then, a clean computer is a happy computer—which is where this Instructable guide comes in handy.
Granted, the inside of one laptop may vary greatly from the inside of another, but—as the author of this Instructable points out—the same basic ideas apply, so if you practice a little common sense you should be fine. Cleaning Your Laptop Cooling System [Instructables]