Pull the mixture or condition lever and the propeller comes to a stop. Turn off the switches and what had been saturated with noise and vibration becomes still and quiet. After removing your headset and while sitting in the momentary silence that follows a flight, perhaps you'll hear the engine ticking as heat dissipates. It's time to pack up and leave the cockpit: Your work is done, right? No, not quite. To get the full benefit of the experience you just had, to learn from every flight, you need to spend just a few moments debriefing your flight.
This is a companion discussion topic for the original entry at https://www.avweb.com/flight-safety/technique/post-flight-debrief