I'm currently studying for CFI for the second time (did it two years ago, worked, quit, got a non-av job, now I'm going back). I condensed the most imperative points of the FOI, then typed them all and hung them on the wall. Any time I'm making a lesson plan, I reference that list. It helps me decide what's really important. My problem is that I love systems, so without those key points in mind, my lessons end up too technical and far off the focus point.
I'm doing the instrument course first, then commercial, then private, since in my opinion it's working from the most amount of information (and in some cases minutea) to the least. I hope to judge the correct amount of information to withhold from the private course this way.
Aside from that... flash cards are only 44 cents for a 100 pack at Target. Next time I'm there, I'll ask if they give any price breaks for a pallet.