Other ways to boost metabolism include gaining muscle, eating higher protein foods, intermittent exercises throughout the day, eat spicy foods with capsaicin, avoid goitrogenic foods so they do not interfere w/ your meds, don't cut calories too low - consume at least 1200 if not more depending on needs, limit alcohol, limit stress, drink plenty of water, and get enough sleep.
Since the medication is acting as a normal “thyroid”, there should be no issues with how foods affect your health. Except for a few foods that may interfere with your medication, it should be safe to consume a normal healthy diet. Check out this article for some great info and the foods to avoid. Always check w/ your Dr. prior to beginning any new dietary pattern.