Soliciting Advice and my Bar Study Progress Report

The advice I need: For those of you who have gone before, how does one recommend staying awake in BarBri?

And now my progress: I started with a lack of coffee in the morning, so this could be the problem [I was running late and was 25 minutes late to the beginning of the session]. I tried to counter with RedBull at the first intermission, to no avail. At the second break, I got a Venti Nonfat Cappuccino which helped. Then I spent the afternoon with my BarBri Books in front of me while I was napping on the couch.