You need good constraints to be creative. You need really strong constraints. And people might think, "Well, I want to be outside the box," or at least, "I want a really huge box." And I would argue a lot of the time, you actually want the smallest box possible so that your options are constrained so you can make faster, better decisions.

– Tim Ferriss in How I Write - Write Like A 5x Bestselling Author with Tim Ferriss (~20:40)