Adam Savage of Mythbusters prizes efficiency. Over his years as a special effects artist, he built and rebuilt his toolboxes until they made every tool he needed immediately accessible:
I wanted to make an impression at my new job, so I spent an entire weekend remaking the bags out of aluminum. My supervisor suggested scissor lifts to keep them even with me when I was seated. He might have been joking, but I added them.
The finished boxes housed everything I needed, but I repeatedly rebuilt the insides until finally no tool had to be moved out of the way to get to another. That’s first-order retrievability.