Attend humor conferences. Read books on therapeutic humor. Visit web sites of various therapeutic humor experts. Unfortunately, the research on therapeutic humor is very lacking and most of the research is actually on laughter and not humor. Laughter of course is a physiological response to humor.
Laughter increases tolerance to pain.
This means that we do not yet know if endorphins are released during laughter. There is also no research that indicates that humor heals illness. We may infer that humor is healing, but there is no direct evidence to support this belief. Humor directly changes distressing emotions. Therefore Humor may reduce the risk of heart disease.