OCS changes all the time. I went through the "old program" and my version was different than the "old program" of a few months prior. I read a lot of gouge before I went to OCS and probably the best advice I can pass on is the simplest; know the Big 4 down cold (will save you lots of time), put out all the time and every time, and show up in the best shape of your life. You will get RPT'd into the ground, you will spend hours/days preparing for an inspection you will probably fail at least once and you will want to fall asleep while standing up almost all hours of the day. Do your best not to get yourself hurt and do the above and most anyone with the will to get through OCS, will.
EDIT: Be a team player, try to think how can WE get through OCS vs how can I get through OCS. This will get beat into your class anyways but the sooner it happens the better off all of your class will be.