Body Bugg is a gadget you wear on your arm, and it keeps track of calories taken in and out. You of course want to have a negative balance if you want to lose weight. It comes with software and online support.
It’s a little pricey, but if you need feedback, and who doesn’t when you’re losing weight, this is a good idea if you can afford it.
Amazon sells it for $179.99.
I saw a lady running with it yesterday, and it looks pretty interesting.