Betting techniques

[SilverRP]

I've read several threads on here that give good information on finding winners, using different angles, and so on. I'm interested in hearing some of your betting techniques (amount included). I know it may vary quite a bit, but what is your main betting technique and why? For instance, I normally play $10 win tickets and put that horse over 3 or 4 for an exacta. I also usually dont bet horses that are 5/2 or lower. Every so often I'll play a 5$ exacta boxing 2 horses. I've got one friend who will only play $50 win/place (usually favorite) with $20 exactas, and one who will only play exactas/trifectas by keying 2 horses with 3 or 4 under, never putting win/place money on them. What are some techniques of yours that work, and those that don't work as well? Thanks