Multiple things but when i am at my lowest i drive to the country side in my (reasonably fast) Honda, find some twisty mostly abandoned roads, put on some aggresive or upbeat music and drive like there's no tomorrow. Try to forget all the regrets and negative feelings and just focus on the road, shifting the gears, revving the engine and pushing the car to its limits. The thrill and danger of it makes me feel.. alive. After like 40 min mostly (sometimes longer sometimes sooner) I feel calmer. Some sort of chemical relieve. I then check where i am on Google maps, put On some podcast or Chil music and cruise down home on cruise control.