Confidence sometimes isn't enough. However, when you consider what you've accomplished with a 78% after only an hour and 45 mins, don't you think that's pretty good for your second try?

Try mind mapping, using color, and if you can:illustrations, but it's not necessary, after each 30 minute pass. Branch out in the layers of knowledge that you're building after each pass. If you want, try just sketching out a rough mind map, and then redo a clean one. You'll often find that mind mapping can almost automatically put stuff down on paper that you didn't even know you knew. Have you tried this?
-youngprer
geocities.com/doc5587
pub117.ezboard.com/btheworldofyoungprer