There are some pretty good flying tips over in the Judging Clinic, tho that wasn't the original intent. It kinda spills over from Judging to Flying to Coaching, and I happen to know that's cool with the Moderator.
A few points I'd suggest are (assuming you fly upright with your handle straight up & down, and "up" is "back stick"), learn to fly inverted with your handle in the same position...none of that turning your hand sideways stuff. Bad for your inverted flight scores, because you'd need to synch your rotations perfectly to the plane to avoid up/down inputs.
Another is to start the OH8's off your right shoulder (tough if you're a Lefty!) and turn downwind during the climb. The reason is that since most of us are old and stiff, most everybody flies them "out front", which turns out to be
upwind. That makes for some problems. If you can actually do them overhead, it won't hurt your scores, but if you can't do them overhead, you'll be better off.
Thirdly, get your list and description of the tricks and "dry fly" at home. All maneuvers should be done while facing the maneuver square. Actually stand and rotate, and put in all the laps...five minimum after launch, six inverted, two after each maneuver (except 2.5 after the Hourglass/prior to the OH8's), and be sure to grease that landing! Footwork is important, along with body positioning, hand and arm positions, etc. Don't forget to have fun!

Steve