Eliminate the tension of knowing interruptions may happen. Greatest productivity is after 4PM on a day I can work late, when everyone else is heading out or gon

Eliminate the tension of knowing interruptions may happen. Greatest productivity is after 4PM on a day I can work late, when everyone else is heading out or gone, and there is no looming anticipation of someone/something interfering. It's like finding an open road, straight, dry, and no chance of surprises rolling into your path: just floor it and go.