Discipline is a must if you are hoping for a streak of consecutive winnings. You must never let yourself get carried away by a game even if you feel lucky. A disciplined player knows when to stop, what hands to play and what hands not to play and what types of games are for him.
Take challenges only when and if you know for sure that you stand a change against those players and with the respective bids. If you just enter a game out of pride or because you are unable to say no, you might find yourself overwhelmed by the experience and bankroll of all the other players. You must always try and play in poker rooms that are chosen by players with your skill and bankroll or less. To never find yourself in trouble when playing poker you must master well the skill of discipline.
Discipline has to be reflected in your everyday life as well, because everyday emotions and problems can influence your poker game. If you cant have an ordered life with no emotional or mental variations and you probably cant because no one can do that then you will avoid playing poker when you dont feel emotionally and spiritually up to it. Play poker only when you are calm, only when you...