1) Always trying the new diet fad: inconsistent dieters can end up gaining more weight due to the brain's survival mechanism that freaks out when it thinks you are starving. The fix: master one healthy change at a time so your body can slowly adapt to a lower calorie diet. 2) Snacking on fitness foods: dieters are often tricked into thinking that they can eat more of something if it is a fitness-related treat. The fix: don't assume a protein bar will get you closer to your goals and mix it up with healthy snacks and high-intensity workouts. 3) Depending on a fitness tracker: those who rely too much on a fitness tracker can end up giving up once a daily goal of 10,000 is reached. The fix: Use your tracker as a guide but don't underestimate the power of constant daily activity.