The first I recall, from when I was quite young, was autosuggestion, advanced by one Emile Coue
, and it was delightfully simple.
The insights, observations, technical developments, and procedural innovations of the scientist, pharmacist, and psychotherapist Emile Coue (1857-1926) greatly influenced hypnotism in the English-speaking world (for the Francophone, see Centassi & Grellet (1998), Guillemain (2010), Westphal & Laxenaire (2012), etc.
Emile Coue and His Method of Healing by Conscious Auto-Suggestion: An Interview with M.
Les grands pharmaciens: Emile Coue ['Great Pharmacists: Emile Coue].
The Practice of Autosuggestion by the Method of Emile Coue (Third Edition).
Transcontinental Meditation: Getting Better with Emile Coue.
Emile Coue and his Method (II): Hypnotism, Suggestion, Ego-Strengthening, and Autosuggestion.
AT THE BEGINNING of the 20th Century, a French pharmacist-turned-hypnotist-turned-self-motivationist, Emile Coue
by name, believed that people would be happier and more productive if they could get to know and like themselves.