I love this skeptical and evidence-demanding attitude.

You may find evidence to support this (and other information about habits) in The Power of Habit by Charles Duhigg. http://www.amazon.com/The-Power-Habit-What-Business/dp/14000...

From personal experience, I've found the Seinfeld Calendar to be powerful, which is similar to the idea the author wrote about. http://lifehacker.com/281626/jerry-seinfelds-productivity-se...