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Exercise regularly (work with physical therapist, stretch and strengthen, go for long walks, hike if you can, practice good posture).
Try to find a job that fits your body's limitations, or see if you can make adjustments at your current job. Prioritise, health being on the top of the list!
Make sure you get a good sleep.
Get to know your body, get to know yourself. It requires a lot of learning. And a lot of patience. Be consistent in anything you do (exercise, meditation, yoga, breathing exercises, sleep, time for work, time for family, and time to chill). It pays dividends.
Stress management is very, very important, as stress can trigger inflammations and consequently you find yourself in a lot of pain.
Make time for doing things you love to do. Hang out with your friends and family. Ask for help when you need one.
Stay positive and learn how to live with the disease as best as you possibly can :)