I love it when piano lessons are the roots of awesome life lessons.
Refresh! This is exactly what I told my piano student today and I had it written on her home practice log. To play the songs she already learned at least once a day, so she won’t forget them. This way, without even realising it, she will “own” the piece better and better and it will become easier to play even without the music sheet. It’s a process that might not make sense to her right now, but hopefully she’ll include this little “happiness habit” in her everyday life.
So think about whatever it is that you need to be reminded of daily and refresh that thought, that action or that attitude until it becomes part of you.