Yes and make the right descisions and after all: luckTo remain calm!
without emotional control all this is lostposition is one of the factors, except for the position it is important what kind of hand you have, how your opponents play, the size of your bets. But I personally think that first of all this is luck. If you scored enough chips in the beginning at least 2-3 times more than your opponents, your chances increase
To remain calm!