@ConstanceClaire In doing my research over the past few weeks I’ve had quite a few “why didn’t I think of that, it seems so obvious now” moments 
The book that’s changed the way I practice is Dr Molly Gebrian’s book “Learn Faster, Perform Better” as it has really simple ideas that are relatively easy to include in your practice if you commit to them. Well worth the money IMHO and I’ve seen a noticeable difference in my ability to remember things and avoid aimless noodling in just a couple of weeks.
I did a review of it on my Learning Log a little while ago here Ziggys Learning Log - #57 by ziggysden if you think you might be interested.