PATIENCE
Closely related to discipline, it is easy to let your attention stray when you go through a spell of hands such as 7-2 offsuit, 10-2 suited, and J-4 offsuit.(which you will-often).
Staying focused means that your attention is on the game, and the hands you are not in are a chance to learn more about your opponents.
It is conceivable,especially in slow-moving live games, that you could spend up to an hour folding poor hands.
K-7 offsuit is still a poor hand to play in early position, regardless of how long it's been since you saw the last face card.