There may be something to this - I've found that when I'm traveling my appetite decreases. It's probably just jet lag, but perhaps being in unusual situations every day reduces the need to ameliorate ennui through eating.
I couldn't find any publications by Prof. Fletcher on this topic, so this may just be another conviction-powered self-help scheme.
I chanced upon a less self-conscious approach along the same lines on the New Scientist's wonderful Christmas gift site, http://nomoresocks.newscientist.com/: It's This Diary Will Change Your Life 2005, described by one Amazon reviewer as "Clinically insane but in a funny kind of way." According to Benrik's web site, the 2004 version included such classic life-changing tasks as "today be gay for a day", "today, tattoo a banana" and "today find a way of including the word vortex in all your conversations". The site alleges that it contains material offensive to the IRS, the KKK and the French
Which leads me to think about some paradoxical challenges:
- Construct a sentence that offends both George W Bush and Jacques Chirac
- Devise the "Eat more ice cream and lose weight" diet (aka the Federal budget)
- Find a product that has fewer features than its previous version
P.S. Now there's a thing: according to Merriam Webster, the word oxymoron comes from Greek oxymoros, "pointedly foolish," oxy-, "sharp" + moros, "dull, stupid, foolish." That's the same oxy- as in oxygen, from the Greek oxus, "sharp, acid".