Imagine, for example, that over a two-hour period between meetings, you must schedule an e-mail check every fifteen minutes. Further imagine that these checks require, on average, five minutes. It’s sufficient, therefore, to schedule an Internet block every fifteen minutes through this two-hour stretch, with the rest of the time dedicated to offline blocks. In this example, you’ll end up spending around ninety minutes out of this two-hour period in a state where you’re offline and actively resisting distraction. This works out to be a large amount of concentration training that’s achieved
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