Most of those are pretty good advice. I would add the idea of doing what we can do to correct our situation, each day, and then letting it go of it. We can't fix everything, and we can't fix it all, right now. We can only do so much at a time. The key is to focus on what we can do to make our situation better: do those things, and then relax. Get a good night's sleep, and get up and do it again, tomorrow.
Real change is cumulative. It doesn't come all at once, but it does come. We just have to keep moving in the right direction as best we can, one step at a time, and we will eventually get there.