i took a lighter semester course load in undergrad for the term i planned to take the MCAT. i think i only took 13 hours... whenever i had some spare time from those classes i would open up my mcat manual and go to town. Saturday and Sunday mornings i would wake up way before my friends ever did and take a practice test each day. by doing this i could still have my fun on the weekends and actually have something accomplished. I started studying at the beginning of a spring semester (january) and was prepared for the MCAT by may when i took the test. Just do practice test after practice test....because if you're takin the test, you know the material on it. the hard part is deciphering the answers apart from each other. good luck