I put together a "Ten Steps to CFI" page that has helped hundreds of CFIs get their tickets: Jedi Nein's CFI Page. It's the basic information I give to my CFI wannabes and seems to help them out a lot.

Get the writtens out of the way with or without pretty pictures, then get cracking on your lesson plans. The goal is to gain "instructional knowledge" and creating the plans is a good way to do it.