Here's one for your list that worked for me within 1 week of starting: dropping wheat from my diet. Noticed you don't have diet as a category even.

For more detail, I was sleeping in two wrist braces every night and doing stretches and strength exercises for an hour or more a day before the diet changes. Now I don't need any exercises or braces.

When I regress for a day or two it comes back, but not as bad.