What is the best way to lose the dreadful double chin?

[Bob S]

I know that just doing overall excersize is good but can't you excersize the jaw?

I read something about the shovel, where you open your mouth, lower lip over lower teeth, and move your jaw up and down...do it daily and it will take a difference.

Any tips?
Ah gum too, I might have to try that and look out for some results, any other tips?

Thanks :3