Not quite recently, but after skating through high school and most of college I learned that if you read through your notes before a test you remember more things. I also learned that this is referred to as "studying".
I am convinced that being "smart" in high school and college stunted my career. I didn't do any work in high school, and had like 2 classes that I'd consider difficult in college. I never learned the value of hard work.
Same for me! Everyone told me I was smart, so I never studied in college. Turns out you can still be smart and also fail out of college. Luckily got my act together, but I hold some resentment for my teachers and parents for not teaching m that you can have a knack for things but without follow through it's worthless