It's tough getting old.
There are things I do every day without missing a beat, but the one thing I almost always can't remember is to remove my garage door clicker (i.e. remote opener) from my car when I lock up and go upstairs to my apartment.
I'm on the top floor (4th), and I almost always have to get back on the elevator and return to the garage to retrieve it.
I'm so frustrated with it, but I simply cannot remember to do it.