There are a number of different ways in which Texas Hold 'Em Poker can be played. However, the rules for this variant of poker were already covered in another section and therefore some rules that are rules of ethics and rules of conduct and general rules of playing will be covered here. These rules will help you greatly if you ever happen to find yourself playing at a casino because they will reduce the learning curve that is so frequently brought on by being new to a particular scene.
Hold 'Em is one of the rare games in that you will find it present in all of the different betting structures that you can think of. Most casinos will offer it in limit and no limit variants and you might even be able to find pot limit and spread limit as well. If you do not find them, it is not because the casino disapproves of playing the game with those betting structures, but probably because they make more money through the utilization of a different variant and betting structure combination. You can find online pot limit hold 'em games all the time and a lot of home games will play spread limit hold 'em on a regular basis.
If you want to be a professional poker player or even just an amateur player that makes a lot of money doing it, you need to start acting like one. It is considered good etiquette and just good sense at the poker table to only look at your two starting cards once the action comes to you, because doing otherwise might influence the play of the players before you.
For example, there was one poker player that used to look at his starting cards and then decide right there if he would play the hand. If he decided to play the hand, he would put his card protector on it. Pretty soon, people caught onto the fact that he was doing this and it allowed players in positions before him to overcome some of their positional disadvantage; much to the chagrin of the other players. Therefore, especially if you are playing with a lot of poker regulars, try not to look at your hand until the action comes to you.
At the showdown, if a player has shown a hand that has your hand beat, you do not have to show them the losing hand. You can muck your cards face down so that you can prevent everyone from seeing what you called with. Conversely, it is considered bad etiquette to ask someone to show you their hand if they have made a move to muck their cards. Never ask another player to see their losing hand, because if you do it could put you in a bad spot as far as the way you are viewed by the other players at the table; something you do not want to happen.