You can’t see your teeth move in the mirror. You see it in the photo from last spring.
STILLNESS
STILLNESS
Daily checking is the worst instrument for slow change, because the difference between one day and the next is smaller than the noise. A mirror shows you today only. A picture from months ago is the one thing that can show you movement, and the change was happening the whole time you were failing to see it.
Stop checking daily on whatever you are waiting for, and set up a comparison instead. Take one photo, write one number, record yourself playing the piece. Put it away, and look again at the end of the season.
What change in you would only show over a year?
Free, with nothing to buy inside it.