Seth Roberts is an interesting psychologist. He seems to have built up quite a following from non-academics, as well as academics, due to self-experimentation.
Seth notes self-experimentation has several advantages over mainstream academic approaches. 1) Time: the self-experimenter doesn’t have to deal with coordinating with lots of people so she can rapidly and easily perform one experiment after another. 2) Freedom: the self-experimenter has freedom to study whatever she wants. and 3) Motivation: the self-experimenter has more reason to study something that matters and get the answer right.
Seth has used self-experimentation to develop a novel approach to weight loss, and a number of other simple interventions for health and well-being. I won’t vouch for each one, but I do think we could all benefit from introducing a pit more systematic self-experimentation in our lives.