If you're only going 1 day in August, then I'm almost certain you won't be able to ride all the coasters, especially if you've never been there before. So the ones you shouldn't miss are the ones posted by Cornbread, and after those, if you have more time, you could ride other the other coasters.
I recommend riding MF right after they open the gate to the park, and for your very last ride at night. Riding it in the morning will pump you up for the other coasters. It will also give you a good few seconds to get an elevated perspective of the park before you are "launched" over the hill.
Riding it again at night will give you a FORCEful idea of how rides in the morning differ from rides at night on MF. You drop into pitch bladckness, and the ride feals at least 2 times as fast! This will let you end your trip with one of the best memories you'll ever experience.
*** This post was edited by CP_bound on 1/18/2001. ***