cleaning/dusting out computer

What's the besy way to get the dust, cat hair, crud out of your computer? I've seen vacuum cleaner, air compressor and those aerosol cans recommended. Is it all above, none of the above or something else entirely?

I use the aerosol cans. I've heard that an air compressor has too much "power" and could damage components, but don't know if it's true. I also use a tiny little attachment for my hand-held vacuum to get the crud off the bottom of the case.

I also use a vac attachment to get all the dust bunnies

I've been told you shouldn't use a vacuum because it generates static. Better to use canned air.

I use a Dyson Animal with the little bristle brush attachment(very carefully obviously) and never had a problem. I think the watchword is whatever you use, use it with care and common sense.