27 on an august sitting.
34 the next april.
The first time i studied material, but didn't really dedicate a lot of time because i was working full time.
The second time i spent a good 2-3 months studying a couple hours a night, doing full length practice tests, listening to audio osmosis ... i was working and in school but i took classes that weren't going to kill me and i worked as a physics tutor so that helped me "study" too.
taking it again is a good idea!
august to april is probably best because you maximize your studying. you have like another 7-8 months. but i guess that doesn't really apply anymore now that the computerized mcat is offered more frequently.