Congrats Chica! That's so great. I hope to have the same problems.
My book deal started nearly three years ago when a publishing house in London contacted me about developing a project, based solely on seeing my website. They asked me to write up a proposal, which I did. 33 pages long. I figured, 'hey, I've got this proposal, I might as well shop it around'. So I did, but when I let them know that, they dropped dealing with me. That was fine, Chronicle Books got a hold of it and called one day. I got a literary agent (which is much easier if you have a project in hand -I was collecting rejection letters), and I started working on negotiating a contract.
It's all a very long, arduous but exciting task. The thing is, once you get past the first project, it's much easier to get the next one going. I'm working on a follow-up proposal right now.
Uhhhh....let's see. There's an excellent book called "How to Write a Book Proposal" by Michael Larsen. I couldn't have done it without that resource.
Just bear in mind how long it took for me to get all those things hammered out...it will seem to others like "Bam! I have a book coming out..." but a looooot of time, no thank-you's, and work work work goes into it.