Something that has helped me is developing a meditate-to-sleep routine. It takes time and practice and can be improved upon infinitely. I have stored away subjects and certain interactions/experiences/memories that I find very relaxing. I've practiced being able to recall these things and combined with very focused deep breathing and other basic meditation techniques I can usually drift off relatively well. Again, it takes practice. It's hard to push away intrusive thoughts when surrounded by unfamiliar noises and circumstances (such as lying in a sleeping bag on a pad in a tent far away from your bedroom). I take it as seriously as riding to get in shape for a tour.

I like to mediate on all of the people who did me wrong, and how I should best seek and exact revenge.

There are a lot of "them" that I choose to not think about. You will live a happier life if you try to avoid thinking about "them".

Go to your happy place instead and be happy. Or (this is bike forums), think about your component selection for your N+1 custom bike. And what color(s) it will be.

I hate color. Colors keep me awake at night.