1. Though it is not technically against the rules, showing your cards while a hand is going on is a big no-no. Even if your intention is to fold, revealing your cards to the rest of the table could give another player an edge and ruin someone’s chances of taking the pot.
2. If you fold, do not make a big show on the flop if those cards you just tossed would have made you a winner. Again, this could give other players an unfair advantage over those who are still in the game.
3. Whether it means criticizing another’s play, making mean-spirited comments to the table at large, or ensuring everyone knows what a great player you are, speaking out of turn will quickly make you an unpopular opponent at the poker table. On the flip side, if you encounter a player like this the best approach is to pleasantly agree and move on with the game.
4. Though it may seem totally plausible that a dealer is deliberately trying to take you out of a game and separate you from your hard-earned cash, this is actually not the case. Poker dealers do not have any control over how the cards fall; they are simply trying to do their job. Treat dealers with the respect they deserve.
5. It is against the rules at most poker tables to give advice to active players once you have folded your cards. However, even commenting on the game once you are out of it is also in poor taste.