Your thoughts can significantly impact your ability to lose weight and achieve fitness goals. Positive thinking can increase motivation and energy levels to boost weight loss, while negative thoughts may lead to skipping workouts or unhealthy eating. While it can be hard to control feelings, writing down negative thoughts and focusing on past successes can help transform thoughts in a positive direction to build self-esteem and continue weight loss efforts. Setting reasonable, achievable goals is also important to maintain a positive attitude and avoid failure.