I'm another SSG glove fan. Neoprene gloves - or any that can increase the warmth and support yur hands... sort of the same reason we use splint boots on a horse, support, prevent bumps and keep the supporting tissues warm, so they stay supple. I especially like the real wide wristbands that also support the forearm. The wider the support, the better.
I find that flexing exercises help a great deal. I went to Physical therapy after surgery on my right hand to remove bones. I use the silly putty stuff twice a day for 15 - 20 minutes without fail... and when we're off chasing cows, I drag it along in a pocket in a baggie, and pull it out once in a while and use it to keep my hands limber. (I trade it in frequently at my therapist, and they sure do wonder how that stuff goes from gumby bluish gereen to almost black with notable lumps of FURin a couple of weeks - it's not pretty, but it WORKS!)
NOT using your hands or keeping them moving is worse than the excercises by far.
So, bake bread - that warm dough being worked is a wonderful way to work your hands. Work in warm water - wash animals in warm water or just fill a 5 gallon bucket with water and exercise in it - rolling balls or other items in bottom of bucket.
Be creative, but be consistent. Also, I think fish oil and glucosamine and chondroitin are a great aid. I have to avoid the shellfish, but my husband says it sure helps his hips and knees arthritis.