I find that when it comes to crunch time, notes really, really, help. If you come across a term or something you dont remember, you can just search your notes really quickly with a comp.
When you write notes you also tend to remember it better (because you typed it up) and you are more compelled to understand concepts (because when you type it up, you have to understand it to some extent)
might not work for you, but works for me.