How Do I Do This Again?

After I write this (right now it's Wednesday morning), I'm going to knock out revisions on two separate books, then get back to writing my second book of the Memphis Barbeque series.

This will be my 5th book. I've got two books on the shelves (one of them is out of print but still out there, mainly in libraries), two books in production, and one just starting out on a Word document.

Each time I start the process I feel a little at a loss. How do I do this? How did I do it last time...