[gomberg]

Just knowing your players and betting your postflop hands well. If you bluff with the correct frequency in the different situations and have position, you can play many, many hands even for a raise.

If you play tight, then a lot of the situations they get into you'll never be in, so you don't have to worry about correct bluffing frequency, calling frequency, etc. Playing tight simplifies the game a little bit and you can win fine by doing that. But the guys who play more possibly (most do not) make more than the tight players cause they eek out edge postflop in marginal situations against the right opponents. You'll get this with experience and experimentation. See how your game evolves over the next year as you move up, and you'll probably find yourself loosening up if you experiment a little at certain tables. Remember the best players can still play in a tight gear if that's the most profitable way to play at that particular table at that time against those opponents.