Use your hair dryer on the cool setting to clean your computer keyboard instead of spending money on expensive canned air. Turn the keyboard upside down and blow the air up into it. I clean the tower (CPU) now and then as well. Dust and hair accumulate around the fan and vents can cause all sorts of problems, such as over-heating.
Keeping in mind that CD's should be cleaned as little as possible, if you'd like remove smudges, apply a little rubbing alcohol to a clean white cotton cloth and wipe it ACROSS the CD. Never use a circular motion when rubbing, as this will create scratches.
Ever get one of your electric controls or your keyboards wet from an accidental spill? You can save it from short-circuiting by immediately disconnecting, turning upside down and shaking out whatever water (or other liquid) you can . . .
