Make sure you are doing something for you and you alone. Resolving to do something for a family member or society is a sure way of setting oneself up for failure.
Is it from your heart? Is it meaningful to you? You want it and what are you willing to do for it? Be responsible for the goal you are setting. Make sure it is possible for you to achieve it.
Don't lose weight to prove something. Set a goal that is attainable and self-initiated. Remember there is always a bit of discomfort in change because you are reprogramming a past behavior. This is only temporary. As you work through the difficulties, the positive changes will occur. The discomfort is very small compared to the pay-off.