Ensure that your goals are as clear as they can be. Setting vague goals deprives you of the focus you need to achieve them. Consult yourself. Consider why you want to achieve your goal. If your motivation is not solid, you are unlikely to stick with it. Also, get clear on how you will go about achieving it. Finally, ask yourself what the consequences are for not meeting your goals. Write these down and review them every so often.
Source: learn.filtered.com