Don't buy bottled water at Disneyland (or at any other time).
Don't set your alarm clock the night before, when you're tired.
Put money into your savings account first, then spend what you have left.
Don't set goals after a disappointing day. Set them when you're on fire. When you're crushing your number. When you're feeling good about things. Then review your goals when something falls through.
When it comes to planning and setting goals, time and context matter. It takes self-control and follow-through to do what you committed to doing. But if you allow a poor circumstance or an unfortunate situation to dictate your future goals and plans, then you'll consistently set a bar that is too low and follow a plan that you're not really serious about.