How to Stick to Your Fitness Habits the Easy Way, According to Science

It might seem like a simple matter of self-control. But it turns out that people with high self-control may not necessarily be better at resisting temptation. They might just experience it less often in the first place.

• Have to” goals are set externally  ( e.g.: a doctor tells you that you should lose weight) and may be more effortful to reach;
• “Want to” goals are the ones you feel internally motivated to accomplish  (you do your workout because you love how it makes you feel) and usually don't need as much self-control.

Counterintuitively, you’d be better off viewing photos of junk food, instead of healthy food, because viewing the photos induces satiety, decreasing the desire for and enjoyment of foods of the type shown in the photos.