good rule of thumb is to choose a Highlight that takes sixty to ninety minutes. If you spend less than sixty minutes, you might not have time to get in the zone, but after ninety minutes of focused attention, most people need a break. Sixty to ninety minutes is a sweet spot. It’s enough time to do something meaningful, and it’s a reasonable amount of time to create in your schedule. With the tactics in this chapter and throughout the book, we’re confident you can make sixty to ninety minutes for your Highlight.
