The quickest way to get smarter is to learn how to learn faster.
Source: 10 Habits That Help You Learn Twice as Fast by @chrisdunntv
I would add to start and end study sessions with prayers, same with tests.
Do not put a book between you and those you are listening to. I had a fold-away desk top while getting my MBA to talk to my family when they came into my study area and never took study materials to meals or time set aside to be with my family.
Easy ways to educate yourself during your free time
Source: 3 Tips for Learning Efficiently When You’re Doing Nothing Better