Okay, here is some basic advice I have for you. When you take your practice tests, take them in a variety of locations. Some place with other people and other computers around you so that you get used to the sounds that could potentially get distracting. I took the 7/30 MCAT this year, and I do believe that the VR passages were definitely longer than on the AAMC tests; however, I also feel that what messed me up the most was the fact that some people were just getting to their WS's, and the noises were completely distracting.
As far as studying goes, I think you just need a basic assessment of your own strengths/weaknesses. Take a diagnostic, and look at what you are good in and what you aren't so good in. Then, just be persistent with your study schedule and constantly check yourself with practice tests (not just AAMC... that was my mistake!) to see what your progress is.