For the review, to be honest, the review games were fun! It's more fun when everyone is sort of well prepared.. I was not really prepared during the review games which we played. I knew the stuff from second half of the year, but not the beginning of the year! I did start to study from Monday night to Wednesday night and it really helped with, of course, answering the multiple choice and essay questions. People say that you can't study the whole book and you are not supposed to be studying, but I'm glad I studied. Unfortunately, it did not pay off with AP bio exam but I feel confident about this one.
For the next year, I think may be you should cover each period each day as in take foundational period as an example. You can just go over few important points/civilizations that people have questions on and refresh the memory. Since it was at the beginning of the year, for me, I had hardest time remembering. So, I don't know how this would work out, but may be worth a try?