Practice and play journal with pen.
This VISION54 Notebook is your best friend. It's empty to start with! We want you to be your own best coach. Here you can keep notes of what you are learning, your own tendencies, lesson notes, what you do when you play well, what happens when it's not going well, etc..
Refer to it often to track your own journey and find the common denominator for what you do when you play great golf.