Beyond that, there are a few basic casino rules you should follow:
Never sit at a table unless you’re going to play (no chilling and watching your buddy play).
And wait until the hand is over before you sit at a table.
When seated at a table, never take your phone out. They will yell at you.
Don’t touch your bet once you’ve placed it and the hand/spin/etc. has been dealt.
Only touch your cards with one hand.

Don’t touch your winnings until the dealer has counted them out in front of you and pushed them toward you.
Never stall the game to act like a hotshot (no blowing on dice, jumping around, or generally acting like you’re doing anything even remotely important).

You should always give your dealer a tip on a regular basis, either by giving them a chip and saying, "This is for you," or by placing a bet on their behalf. Never try to tip them cash, chips only.

Always tip your cocktail waitresses. I give them a $1-$5 chip every time they come around.
If you follow these rules, you might not win any money, but you won't get in trouble and have a better time.

Know When to Stop
Because gambling can be addictive, you need to be careful and know when to stop. For example, free cocktails are great, but there’s a reason the casino is giving them to you. Be careful not to lose too many and be reckless with your wagers. Also, don't go after your losses. Thinking you can suddenly get lucky again and recoup your lost money is the “gambler’s fallacy.” You start to believe you are due for a big win, and that you can get all your money back if you just put some more money in. Unfortunately, that’s not how it works. As soon you’re starting to have thoughts of “If I just play a little longer...” stop immediately. Check out Dora55.

Last but not least, stay away from what's known as "gambler's conceit," which occurs when you're winning or in a winning streak. You start to think, “Maybe I should bet more since I’m doing so well,” and “Sure, I could walk away with more than I started with, but maybe I should see this through...” Unwise idea. Quit while you’re ahead. My personal rule is once I’m up 50% from what I started with, I take those chips and put them in my pocket not to be played with again. Then I play out whatever winnings I have left. If I continue to do well, I keep pocketing every 50% until my luck runs dry. With that setup, I’m always walking away with a little more than I started with—if I’m lucky.