Concentrate on the Game, and don't play out of turn! It is a dead giveaway that you are a newbie when you play out of turn, because you cannot do it on-line. There is nothing worse than a player folding his cards before the Action reaches him. So be very careful.
In some Casino's it carries heavy penalties like sitting out for full rotations of the button, and if you are posting Antes along with the Blinds, it does a lot of damage to your Stack!
So Relax, Concentrate on where the Action is, and be Patient.