I keep a strict 3-6 hour practice routine. My secret to no pain, go to wal-mart and buy some MSM with Glucosamine(or Chondrotine) vitamins.. take about 4-6 a day. Keeps the arthritis away too. If you already have lots of pain, it may take a few weeks or months to kick in.
Before the MSM I had lots of pain. I had broke my hand during my black belt test several years before I started
playing guitar and I had arthritis bad. I couldn't hardly hold a pick... anyway, my suggestions. ALSO though if I feel like I'm doing to much, I'll stop.. I won't keep pushing and pushing, you won't gain anything from it.