Four years ago, I was diagnosed with advanced degenerative osteoarthritis. Here are some things I've done that I think has made a difference. I've included some references that others might find useful.
1. I read 2 books, "Mayo Clinic on Arthritis" by April Chang-Miller and David Sobel's, "Arhtritis: What Exercises Work". Highly recommended. I really needed a better understanding of what I had and how to deal with it.
2. I made an appointment at Dan Abrams Healthy Living Center with a physical therapist. ( https://dahlc.mayoclinic.org) I asked for exercises that would help me deal with the arthritis in my spine and neck. It took several months to be able to do these exercises. Some were painful when I started, but they have all gotten easier. They have two major benefits. They add strength to my core and they improve my range of motion. You will sweat if you do these exercises. I do these exercises at least 3 times per week. They take about 20 minutes. I do other exercises for strength and aerobic conditioning.
3. The Arthritis Foundation, (https://www.arthritis.org/living-with-arthritis/exercise/workouts/other-activities/tai-chi-arthritis.php), recommends Tai Chi. I got the video and learned the routine. Even if you can't stand, you can do this routine. Mindfulness and balance are the two biggest benefits I have obtained from my daily routine. The mindfulness has helped me to deal with the daily pain.
4. The Mayo book recommends losing weight. I lost 50 pounds on a program offered by the Veterans Administration. The program is more of a life style change than a diet. I've kept the weight off for two years now and have noticed a marked improvement in my knee joint and hip pain.
5. I've had 3 cortisone shots in my spine, a couple in my knees, and 3 in the shoulder. All have helped for about 3-6 months. About once a week I take a Tylenol Arthritis.
At my last doctor's appointment, my doctor said I still have "advanced degenerative osteoarthritis", but I have amazing mobility for someone with my x-rays.