Blow me

I've never liked using cans of compressed air as they are wasteful, expensive and get really cold when you use them and trying to blow dust or lint off a lens with your lungs usually includes spitting on the previously clean surface. I found a gadget that has a clever use of form and function, the Giottos Rocket-Air Blower. It's shaped like a rocket and pumps enough air through the nozzle to get all but the most tenacious bits of crud off your camera or electronics. It even comes with a nice lanyard so you can wear it around your neck. At a price under $10 it's a practical, beautiful and economical little tool.