Hi Bill..
The # 1 thing i can tell you is to "know thy track"
I know this will be hard but take 2 or 3 weeks of just entering lines and reviewing your results without betting
See what factors are winning at the various distances, its a short time but maybe you can see "whats winning" and "whats not"
Go over your results at S A and maybe you'll see something thats a positive factor and continue in that direction...
I'll tell you from experience, jumping from track to track will be disastrous!!
Find a track or two and learn it
good luck
mike