Thou must clean thine computer with canned air at least once a year

If you own a desktop and aren't afraid to open the case every now and again, it's a good idea to buy a bottle or two of canned air and clean out your computer.

By cleaning out your computer case, you'll extend the life and health of your computer (as components last longer if they're cool, and dust can very much clog up cooling fans).

Otherwise, you'll end up with dust, or in more extreme cases, snakes in your computer.