Boy-if I could answer that question, I could help many more people.
Finding a good chiropractor can be a challenge. I think one of the ways to select a good chiropractor is to find one with advanced education in “Chiropractic Orthopaedics” or in “Chiropractic Sports Medicine” This does not guarantee a better chiropractor but someone who has taken more time for advanced training demonstrates further interest in bettering him or herself.
The best chiropractor is one who has good diagnostic and manipulation skills along with a thorough understanding about rehabilitation techniques.
Acupuncture is another matter altogether. I have found that acupuncture works in some patients to control pain but does not yield long term relief. As long as you understand that, acupuncture is a good tool for intermittent back pain relief.