Since I had a surgical fusion of my cervical spine, I can't use a chiropractor any more. When I could, I always went by friend's recommendations. The other thing, maybe it's silly, I wanted to check out his hands. If they looked gentle but sure in their movements, and most importantly, if they were CLEAN. I checked out a chiropractor who turned out to have dirt under his fingernails. You can imagine how fast I got out of there!