I'm depressed all the time. What do you do to stop yourself from being depressed?
Choose a huge impossible goal and make it happen. Stop being what George Bernard Shaw referred to as ‘a clod of grievances demanding that the world devote itself to making you happy’ ( my best paraphrase ) A giant self-imposed challenge will give you purpose and take you out of your head.
Whenever I’m between books, I’m as miserable as you.