Since the list of question is public information, you can just memorize the questions. I've put my own no frills practice exam together here (about a year ago); I hope it can help you out. Ideally, it asks you each question just once and you answer correctly. But if you answer it incorrectly once, you must answer it twice correctly to show it that you have learned from your mistake. Of course, it picks them at random...
It worked for me! I took both Technician and General tests at the same time for the same fee. Basically, the General test allows you to also transmit on the lower frequencies (useful for longer distances). I never have even opened the actual book, which I do feel a little guilty about.