If you want to truly improve, you must view the situation before you with the respect it deserves, especially if you have not succeeded in the past during similar circumstances. To take it lightly might cause you to fail yet one more time. Don't let it happen again by approaching it with caution. Analyze it carefully and act accordingly.
Keeping promises is hard. It requires us to do things we don't want to do. But keep those promises you must do. Otherwise, do not make them in the first place. But since you have made them, you must keep them, especially if it would benefit all those involved including yourself.