[summarite]

Invest time in your mental health, ie give your brain time and the possibility to truly rest. Meditation, walks in the woods (no headphones!), a fun (!) book at a rekaxing place. Or if that's too much at least start by not filling every minute. No smartphone on the toilet, no music or podcasts while walking to work, swim rather than gym, walk or public transport where possible rather than the car, not every evening a beer "to relax" but instead just a warm drink, smartphone away when playing with the kids, ...

If you really want to go bold, one of the best decisions in my life was to do a ten day silent meditation (i did one of those of dhamma.org; free courses where you of course donate according to your means at the end).

Idle time is an investment in your brain. We don't need constant information or entertainment.