I am going to start on the last book of the Paradise Earth trilogy, Appocalypse. (God I hope I spelled that right, lol)
I have the synopsis written out, and my next step is a loose outline (it's a novella, so a tight outline might strangle it) and decide who the main character will be.
The first book starred Adam and Evan and the second book featured Sharkey. This book's hero is an angel called Freya. (this is subject to change, lol)
At any rate, beginnings are both daunting and exciting. I love starting a new book.