Otto,
No real words of wisdom to share, but believe me, you're in good company here. I've been dealing with recurring bouts of bow arm tendonitis for years. And frankly, nothing but LONG periods of rest (read- long periods of NO fun) seem to work. I've found that going to see a doctor is an exercise in wasted time and money. Doc says, "Labs4me- my recommendation is that you give your elbow a rest. Try, icing it and Ibuprofen will help too." Wow Doc- thanks for the advice!
Ice helps. Medication helps. Reducing bow weight helps. All just common sense suggestions that you don't need to pay a Doctor $100 to hear. Really though, the only way to get it under control is to refrain from shooting for an extended period of time. Unfortunately though, once you start shooting again the discomfort will probably creep back again to some degree. I found that by switching from shooting my recurve with a locked elbow and strait wrist grip, to shooting a longbow with a bent elbow and a medium wrist grip I'm able to shoot with considerably less discomfort.
When all else fails, don't discount the medicinal value of JACK DANIELS!!!