Apparently the idea came from the book Atomic Habits by James Clear. Here's an excerpt:
The Two-Minute Rule states “When you start a new habit, it should take less than two minutes to do.”
You’ll find that nearly any habit can be scaled down into a two-minute version:
- “Read before bed each night” becomes “Read one page.”
- “Do thirty minutes of yoga” becomes “Take out my yoga mat.”
- “Study for class” becomes “Open my notes.”
- “Fold the laundry” becomes “Fold one pair of socks.”
- “Run three miles” becomes “Tie my running shoes.”
The idea is to make your habits as easy as possible to start. Anyone can meditate for one minute, read one page, or put one item of clothing away. And, as we have just discussed, this is a powerful strategy because once you’ve started doing the right thing, it is much easier to continue doing it. A new habit should not feel like a challenge. The actions that follow can be challenging, but the first two minutes should be easy. What you want is a “gateway habit” that naturally leads you down a more productive path.
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Not to be confused with this Two Minute Rule, which actually sounds more like Gretchen Rubin's One Minute Rule.