Exercise helps me a lot with this. Running mostly and some push ups/sit ups/ pull ups / bar dips

For me I find it easier to work through mental tasks while occupying myself body and mind in intense labor like this.

It also is scientifically proven to reduce stress hormones in your body which are directly linked to anxiety and depression

Also also, you’ll look and feel better all the time and so constantly have just a little more confidence

Also also also, if absolutely nothing else is going well for you and you still stay disciplined and follow your exercise plan there is always that “at least I did this” mentality. And since most people dont work out at all any amount means you’re putting more effort in to at least this one thing than most people.