There’s a really wonderful book, ‘Loving What Is’, by Byron Katie. Byron Katie was an overweight unhappy housewife. She turned herself into a halfway house for her weight (because that was the only place her which would take her insurance). While there, she had a metamorphosis that her thoughts were the cause of her condition. She came back totally transformed and created a four step plan (called ‘The Work’). Through this process, one is able to take a thought they have which may be affecting them adversely. They are then able to investigate them and through a series of short simple steps, shift them in a positive, effective way. Check it out! You might find it helpful.