Prayer, meditation, reading, lavender oil, no caffeine in the afternoon, exercise. I try to avoid anything that gets my thoughts racing like a violent movie, loud distractions, or visually stimulating hobbies like video games. I had to have some help in early sobriety with my anxiety, wellness visits and a prescribed anti-depressant. Lots of AA meetings too. No single thing made a difference, it was a combination of many things.
"Life is not a journey to the grave with the intention of arriving safely in a pretty, and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming---*WOW-What a ride*!"