Hi @seniw - To be honest, when I have a really bad day I try to surround myself with positive thoughts. I've found 2 especially good sources for me besides my wife to help me focus on positive thoughts.

A website with a lot of short videos on staying positive and how the brain works... https://www.resilientoption.com/.
A Mayo website page - How to be happy: Tips for cultivating contentment ...https://www.mayoclinic.org/healthy-lifestyle/stress-management/in-depth/how-to-be-happy/art-20045714

That and I always keep hope by trying to learn as much as I can about my health conditions and any new treatments that may not help me but will help others in the future.