well, there are some important things i learned the hard way:
- always put a chip or something (card protector) over your hole cards, so the dealer doesnt fold them accidentally
- if you are going to raise, announce it: "RAISE" and then move the chips in one movement (google: sting raise)
-if you are all in, or other player is all in and you are going to call, ASK FOR A CHIP COUNT.
- bring sunglasses, hat, etc...
- i dont talk, i play
- only look your hand when its your turn, that way you concentrate in the game, and you wont be giving too much "tells"
- when you get a premium hand, dont try to act like you dont have it... instead, do something you always do with every other hand (taking a deep breath, moving your head, etc)... or jut act like crazy on every hand ♦
- chewing gum can give you a lot of tells: if someone is chewing gum, look at the speed and try to get some reads (faster = bluffing for example)
- in a showdown, ALWAYS flip your cards, unless you are really REALLY SURE you lost.
- try to estimate the pot odds, its a lor harder than online
- live poker gives a lot of information, dont focus on everything... to much info, just try to play your online game looking stack sizes, bet sizes, pot odds, etc.
- try some chip tricks ♦
good luck!
BTW, badbeats on live poker are a pain in the ass, RIGGED!!! 
i tried live poker, and i got tired: too slow, too much info... etc
PD i know a casino with a NL200 table, with NL5 players, a shame i dont have BR!!!
EDIT:
if you are interested on reads, read mike caro in super system intro