Too bad we couldn't take the Bio subject test INSTEAD of the General GRE. I am horrible at taking standardized tests, so personally, I study as much as possible. I only took the General test, but you could definitely utilize similar study techniques for the Bio test. I think the thing that helps the most is to take as many TIMED practice tests as you can - preferably on the computer so you can get familiar with the testing style. If you can't take them on the computer, though, I would just get a book with practice tests in it (i.e. from Kaplan, Princeton Review, etc.) and time yourself when you take one. In addition to that, I would probably study old notes from Biology classes and whatever other subjects are on that test.