Not in any specific order butttt...
1. Bank-Roll Management, is a big deal.
2. Self-Discipline is necessary. with that comes things like patience,
bankroll managing etc...
3. Studying. Studying is a key factor in progressing your game to becoming a better poker player.
4. Experience/ Playing X amount of
hands.
Of course, it's not only 4 things that are gonna make you a successful player. These above, are just 4 things I think are some of the things to concentrate on to be a better, successful player. You should also have goals, and expectations. Reasonable goals.
Good Luck on and off the tables,
ason