Lifter, this is a GREAT IDEA.

its really nice to see a CFI candidate that realizes that this is about knowledge and not about spending a lot of money on a quick course "Get Your CFI/I/MEI ind 47 minutes!"

That being said, you do have a lot of studying to do. The Gliem, etc are nice, but really you are studying not only for your checkride, but also for the information that you are really going to use once you get a job. Books that you need to read and probably tab and highlight include, but are not limited to:

FAR/AIM <-this is the biggie
Airplane Flying Handbook (Instrument Flying Handbook)
Pvt and Commercial PTS
Fundamentals of Instructing

And just about any aviation theory book you can.

After this, the next step would be lesson plans, which will be laid out in the FOI. Put some time into these. Some people use them while instructing and some don't, but the exercise of catching yourself up on how to teach each specific subject will be priceless when it comes to checkride and job time.