I would say all of us around here are trying to become better. Each having their own goals.
How do you go about making sure your time studying is efficient? By this I mean the topics you select to study, how you study it, making sure you know the material (drills etc)?

I tend to do database solves, create aggregated reports, and see if I can figure out things from there. Then when I have certain concepts written down I verify these with running solutions that test the concepts. Afterwards I tend to know it because I spend the time working on it.
To make sure I play against the database solve and see how accurate I am.
Is this efficient though?