Having posted on leadership and personal development without missing a day for three years, I've lived and thought a lot about daily activities.<p>I haven't researched it, but this article supports what I suspect, that there is a high correlation between successful people and people with daily activities who stick with them -- but not just any routines. They have to challenge you, you have to do them out of personal motivation, and they have to improve you. Personally, I do burpees twice daily, post daily (though I often write many posts per day), and I got this idea while doing cold showers daily for thirty days.<p>Lately I crystallized a lot of daily habits into one overarching concept that I think has a fundamental role in creating success for many types of people in many fields: the Self-Imposed Daily Challenging Healthy Activity, or SIDCHA, which I wrote more about here -- <a href="http://joshuaspodek.com/number-one-best-tool-improve-life-self-imposed-daily-challenging-healthy-activity-sidcha" rel="nofollow">http://joshuaspodek.com/number-one-best-tool-improve-life-se...</a> -- and will continue to explore. I wonder if SIDCHAs might be a personal development counterpart to the Minimum Viable Product, speaking very vaguely.