Roger,
I had plenty of time during the intro part of the exam to write out my cheat sheet. I included all of the mathematical formulas I could remember, specifically for earned value, contracts, PERT, etc. I also tried to write out ITTOs for difficult subject areas such as Integration. I highly recommend that you write out a practice cheat sheet multiple times before you take the exam so you can 1) have it correct on exam day and 2) remember the content better. Best of luck!
- Steven