I double-dog dare you. Just write a couple hours every day and get a first draft down, don't worry about it being the Great American Novel to start. And if you haven't already read King's "on Writing" it is fairly interesting.
I have the outline of a novel in my head and it is still trying to get out, but it isn't quite ready to come out yet.
< Charlie Daniels Singing>
I'll take yer bet, you're gonna regret, cuz I'm the best there's ever bin....
</Charlie Daniels Singing>