Yeah, like Ansky said. If you are the casino the hand doesn't end when your cards go into the muck before the flop. Read the table. Notice the aggressive and rock like players. Notice some betting patterns. If they tend to play big hands fast or slowplay them. See what kind of hands they are raising from and where. For example, they are raising KJ suited UTG+1. Or if they re-raise only with aces and kings.

While the hand is happening practice what hands they have. See if they check/call on draws,etc.

Mike Matusow was asked a question not too long ago about how he got so good at reading people. He responded that it had to do with years of being a poker dealer and moving the cards forward to show the winning hand before the cards were even turned up. You can do this too, in a sense, by reading people outside of a hand.

Good luck.