Going in Three Directions at the Same Time?

I have three projects I really want to work on badly. Long term projects that will take serious time to complete.
What are those three projects?
Write "Dragon Hunters" which is book 1 in the DragonHawk Saga
Edit "Tycho Station," book 2, which is technically finished but needs some serious editing.
Edit and Rewrite "Dragon Summer" book 3, which is a combination of Dragon Summer, the Star Trader and Gaanard Station into one book.
Hmm, pause while I eat dinner...