1. Plenty of yoga: This lowers your cortisol levels and thereby improves insulin resistance and depending on the practice, will stimulate thyroid.
2. Whole foods: avoid weird things that don't look like food. Correlate how food makes you feel, not just in the 7 minutes it takes to eat your meal, but afterwards, does it spike your sugar? does it make you feel good?
3. Reasonable levels of cardiovascular exercise: some helps with metabolism, insulin receptors, and depression. But, it does not make up for junk food.
4. Be kind to yourself. Don't beat yourself up for being human and eating something that makes you feel poorly. This is not a time to raise your own cortisol levels by berating yourself. Its much more effective to reprogram yourself to handle the situation differently in the future. And, don't expect yourself to be perfect the first time, every body requires practice before they play Carnegie Hall.