Keys to becoming a Better Poker Player Part 2

Know Your Opponents:

How many times have you made a strategic move that’s doomed to fail because you chose the wrong opponent? Ever run a bluff against a someone who’s a veritable calling station? It won’t work. We all know that, but far too often we do it in spite of our better judgment.
If mathematics was the only skill required for winning, the best players would all be mathematicians — and they’re not. Knowing your opponents is also critical. Observe their actions at the table. Analyze their decisions and the choices they make. Are they in every hand? Do they raise with hands that don’t warrant it? Are they rock-tight? You’ll find it fairly easy to get a read on most players within a half hour. The best time to do this is when you’re not in a hand. If you find yourself waiting for a game, watch your opponents-to-be, so you can adjust and temper your game strategies to their play before sitting down at the table.

Source: Internet Texas Hold Em