A quick and cheap way to attach a Mag-Lite, or any flashlight to your bicycle. You probably don't
need help to figure this out, but just in case.

Edit: Don't do this, it is a wonderful way to ruin a Mag-lite. Seems the vibrations are just a little bit to much for the poor thing. And here i was thinking that Mag-Lites were indestructible. If you find a way to pad the poor little flashlight, or just have an excess of flashlights, go ahead, otherwise, be warned.

Step 1: Acquire Materials

A quick trip to Ace is all you need. Keep in mind the diameter of your bikes handlebars and the flashlight, and buy 2 pipe clamps, one to fit around your bikes handlebars, one to fit around the flashlight.
Simple ain't it?
Buy a bolt and a few nuts to hold everything together.