When doing a lot of repetitions my focus always was elsewhere after a few spins
This was though so easy a game changer for me
Write down the things you want to improve in your playing f.e.: thumb position ,
Lazy first finger , wrist motion….
Place the sheet of paper in front of you when practicing
Do always 1-3 repetitions only focusing on one thing, then the next repetition(s) only focusing on the next thing…
With this simple method you can’t be elsewhere with your thoughts and every repetition will improve your playing
You ll notice an improvement very soon