In my reading, I was struck by how frequently the notion of 20 minutes came up. For instance,
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20 minutes is the recommended amount of time for you to embrace the enduring glare of the sun. Increased intake of Vitamin D will help boost your sleep quality. Source
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20 minutes of exercise is better than zero, especially if you take care to immerse yourself in vigorous activities. More power to you if you make it a routine to exercise at least 3 times a week. Source
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20 minutes is the extra time you gain for your life when you delay smoking a cigarette. Source
Seems like 20 minutes is all it takes for us to do something well enough. The question is, how many such 20-minute blocks do you intentionally fit into your everyday life?