You should get something like this too:-
If you can find a better one I'd recommend. I've got that one, and it's great BUT it only records 20 minutes at a time, and it doesn't make any noise or anything when it's recording starts/stops so you're constantly checking if it's actually on or not. Asides from that it's actually got a really good quality picture. Then you can show us some pro cycling etc.
This one (And I presume most ones) comes with velcro straps that you can attach to your helmet to put it on there, or a mount to put it on your handlebars etc.