I was doing a delivery, and the lift wasn’t working, and there was no way I was dragging a loaded handtruck up 2 flights of stairs with a lift there. So I worked out why the lift wasn’t working, which turned out to be that the outer doors weren’t shutting properly. I managed to jimmy them enough that they’d close properly on their own, and completed the delivery. 

There’s something about problem solving like that – solving a technical, but real-world problem, even a simple one – that is really satisfying. It made me feel alive.