Kathleen Bright's "30 day experiments"

"A powerful personal growth tool is the 30-day trial… a great way to develop new habits, and best of all, it’s brain-dead simple."

http://www.stevepavlina.com/blog/2005/04/30-days-to-success/

Idea borrowed from Steve Pavlina, who borrowed it from the shareware industry.

See, instead, http://inspirewithhope.tadalist.com/lists/public/491198