You should think about house rules, and make sure that everyone knows and understands them before starting, especially when new folks join the game. After all, you probably don’t want gunplay over a simple misunderstanding. (Depending on your location, guns may have to figure in the rules.)
For instance, in my game we have a three-raise limit in each round of betting, and a 50-cent limit for all rounds except the last one, when it rises to $1.00. Pick limits that work for your players, or play table stakes, if you’re rich and have big balls.
Our game allows sandbagging (raising after you started the betting with a check), but some games don’t.
If you play low games, decide what the best low hand is. Some people allow straights and flushes to count as low. Others say the best low is A,2,3,4,6.
Do the cards speak, or if a player says he has a straight, but also has a flush and hasn’t realized it, is he stuck playing the straight?
Some games flat out prohibit wild card games, some discourage them, but allow them in moderation, some allow all of them. Serious players tend to look down on wild cards.
Allow me to suggest a few points in the area of etiquette that will (IMHO) improve the tone of the game. Take it seriously. All players should know the rank of hands cold, without using a cheat sheet. Encourage players to read and follow Hoyle’s basic rules for poker (e.g. did you know that the minimum number of cards in a valid cut is five?). Everyone must bet,check, call, or fold in turn. All cards stay above the table at all times. (Some games impose a fine – fixed amount or even match the pot – for violating rules like these.)
Finally, I strongly recommend that someone invest in a really good set of clay casino-style chips (and perhaps a case to carry them in). Don’t use those cheap plastic interlocking kind, and for god’s sake, don’t play with cash. Tacky, tacky, tacky. You’ll need at least 100 each of four colors, and they aren’t cheap: expect to pay as much as $200-$300 including a case. But they’re worth it. You’d be surprised how much playing with nice chips improves the feel of the game.
Here’s one of our favorite games: Anaconda (aka Screw Your Buddy). It’s a high-low game.
[ul]Deal seven cards down to all players. Look at them and bet.
[li]Each player passes three cards to his left (or right, dealer’s call). (Naturally, you can’t look at the cards passed to you until you’ve passed yours.) [/li][li]Bet. [/li][li]Pass two. [/li][li]Bet. [/li][li]Pass one. [/li][li]Do not bet, yet. Players discard two cards, and stack the five remaining in the order they want to reveal them. [/li][li]All players reveal their first card. [/li][li]Bet. [/li][li]Second card. [/li][li]Bet, etc. to the fourth card. [/li][li]Bet. [/li][li]Before turning over the fifth card, everyone declares whether they’re going high or low. (You know how to do that, right?)[/li][li]The final round of betting. [/li][/ul]
Lots of fun.