My potent deep work sessions start with clearly defining when I will knock them out and how long they will last. So, I block 90 minutes of time I can do every day. And this has varied during different seasons of my working life. In some periods, it was 3 hours. Other times, it was 20 minutes. But having that sacred block of time gives me a foundational "container" to move the needle. Then I work on one single task during that block. (This one is just as important as defining when I will…