I've found very deep breathing exercises have helped me in the past. I highly suggest the Wim Hof method, tied to cold therapy. It has helped me avoid negative thoughts, and move away from procrastination. I've found it helpful to also focus on non-digital tasks. step away from tvs, computers, phones, grab a book, sit under the sun. Don't study, play. Sit on the ground. The earth's field is something we often ignore but some studies show it is necessary to reconnect. Your gut is also something I have tired to manage; cut sugars, test your blood for acidity, avoid certain vegetables (The vegetable paradox), consider parasite management periodically (ivermectin has no side effects), avoid plastics ingestion as much as you can, reduce alcohol as much as you can. This helps. Hope it is something you can try.