It's taken me several degrees to learn how to learn - dogged application to knowing your stuff. In my case this meant that in an 8 week course (taken over 10 days) I have not done 2 1/2 hours a week, but rather 2 hours most of time but 8 hours or more in 'Week 7' and 4 or 5 hours on 'Week 8'. You have to keep going back until you get it; if you don't you will be found out later.
And no guessing.
You have to know an answer is right, or likely to be right, before you provide it. I did take an 'open book' approach to this, which helps a bit. What helped a lot was to have copious notes which I could search and review. These amount to 4 to 10 page for each week - notes, text grabs and screenshots. I like to have this content for my own perusal and reference.
Talking of which - I also take the references for anything I fancy following up. I will in due course follow up some of these.