1. Make a commitment

Long-term weight loss takes time and effort — and a long-term commitment. Make sure that you're ready to make permanent changes and that you do so for the right reasons.

To stay committed to your weight loss, you need to be focused. It takes a lot of mental and physical energy to change your habits.

So as you're planning new weight-loss-related lifestyle changes, make a plan to address other stresses in your life first, such as financial problems or relationship conflicts. While these stresses may never go away completely, managing them better should improve your ability to focus on achieving a healthier lifestyle. Once you're ready to launch your weight-loss plan, set a start date and then — start.