I would like to add one tip to this thread about live play. I see so many people losing big pots because of this mistake (almost every session I have, someone does this).
One person will be all in, but there is still action with 2 or more players still in the pot with chips. Never ever ever expose your hand until the dealer
tells you there is no more acton, and to showdown.
People will get all excited and roll over their boat on the river, before the last guy checks/bets, and it is an AUTOMATIC MUCK if you expose your hand before the action has ended.
Then the people say they are sorry, they didn't know, blah blah blah. Some even get into huge arguments with the floor because they were forced to muck the winner. "I thought they already checked!" says the player who exposed his hand with action still pending.
Never expose your cards until you are told to do so at showdown.