Re: Best advice for new live tourney players
Verbalize your action if you think there will be any chance it could be misunderstood, especially when raising.
Be pleasant to other players at your table, even if you're not outgoing or interested in having an extended conversation.
If you're in a hand, pay strict attention to the action so that you know when to act.
If you think you have won the hand, don't surrender your cards until the dealer has pushed you the pot. (In the instance where you think you've won but you're not being given the pot, politely and calmly ask the dealer for clarification.)
Recognize that tournaments are extremely high-variance events: you can play incredibly well and still lose every single one you play. Look at your buy-in as an entertainment expense; if you happen to cash then it becomes free entertainment.