Flash cards and lots of practice.
If you have Destroyer, you can do this: photocopy the road map pages. Then photo copy them again two times. On one page, use whiteout for all reagents, and on the other use whiteout for the products. Then make tons of copies. I would complete 1 set of each every day until I had them all memorized. I would also carry around the flashcards everywhere and quiz myself whenever I had a few minutes of free time. best of luck