These are not original thoughts, these are proven ways that military pilots have been successful.
General Knowledge -
Everything Explained for the Professional Pilot - Richie Lengle (There is an iPad version also, that is very good and updated recently)
Aerodynamics for Naval Aviators (available online as a pdf), Pilot's Handbook of Aeronautical Knowledge, or another book on Aero.
FAA Instrument Approach Procedures Handbook
I would also suggest studying some Jeppesen Approach Plate tutorials online, or hiring a local instructor to get a hour or two "ground school" on current Jepp plates and how to brief them.
Major Hiring Specific-
Ready Set Takeoff (RST) for COG, JKT
Emerald Coast Interview Consulting (ECIC) for interview prep,
and Checked and Set for app review.
You can't get any more prepared than that.... YMMV