cj0203 & keenas are on the money.
The Flying component is very much monkey see monkey do. Pay attention to the mass briefings. Learn the power settings and the flight attitudes but most of all try to take a deep breath, relax & try not to strangle the joy stick. It's ok to enjoy flying.
Be positive about control movements (don't let the plane fly you) & think "command". Also do lots of armchair flying. I also used a laptop with flt sim to help with armchair flying.
Never ever be late for a flight, or anything else for that matter. And don't let your mates be late. On time is late. Early is on time.
Also learn how to do quick mental time / speed / dist calculations for the panel interview.
Most importantly work together & get along with the other flight screeners. remember that you are not in competition against these people, but with these people. Aim to get everyone through, with the strongest helping the weakest, just as in the military. Trust me, if you don't work together the psych will quickly determine the loner's & prickly personalities & pull all of you to pieces. As they'll tell you on your first few days at OTS, "Individuals don't make it through officer training; Only people who work as a team make it through officer training".
Lastly, everyone studies for the board, but a lot let themselves down with their personal presentation. Remember that you are being watched from day one. Here's a tip, try ironing that sh!tty orange jumpsuit that they give you. Why? because no-one else does. And for gods sake wear a propper suit to the interview. Not a borrowed suit, but one that's been tailored to fit you. Try to remember that you are entering an ultra conservative organisation; "Get a bloody haircut" is not what you want the board to be thinking.
By now you might have realised that your picture that recruiting took way back on your initial assessment day has been clipped to your file the whole time & up to now it is the only pictorial reference that the board has of you. If you were smart enough to wear a suit on that day then you are streets ahead. If not, then try to make up for it with the best suit & linguistic skills that you can muster & may god have mercy on your soul.
Have fun.