If you’re the one with the house key on the trip, check it twice. Reliability is a hundred little checks.

Being reliable is not a personality trait, it is a sequence of small, dull verifications nobody sees. You pat the pocket, you look again, you check before leaving rather than on arrival. It matters more when the key is yours because eight other people have stopped carrying the worry, assuming you are carrying it.

Whatever you are responsible for this week, build in one deliberate second check at a fixed moment: before the door closes, before the bus pulls out, before you leave the house. Say it out loud if that helps. People who do this get asked to hold the important thing.