Today, before starting up the engine, I remembered that I hadn't locked the baggage door. That happened because, as a memory aid, I throw the keys to the airplane into the baggage compartment as soon as I open it. So, when I went to start the engine and didn't have any keys, I knew the baggage door was still unlocked.
I'm wondering what other simple tips are out there to keep us from doing something silly?
I'm wondering what other simple tips are out there to keep us from doing something silly?