I just recently saw that story in a book. What was it... Oh yes, it was in "Situated" by Angela Duckworth (of "Grit" fame). That's the gist of the book. Frog and Toad changed their situation rather than the downstream thoughts or behaviors (through willpower). Make it harder to do (friction up) what you don't want to do and make it easier (friction down) to do what you want to do.