Haha, this thread is so funny! I thought I was the only highlighter, stickie, asterisk geek!
Yellow highlighter for notes during class
Pink highlighter for notes during study
Red felt tip pen for underlining REALLY important stuff that has already been highlighted (you'd think highlighting would be enough...)
Askerisks for important stuff - size of askerisks increase with increasing importance
Stickies - mainly for great diagrams, flow-charts etc.
The BEST feeling in the world, is at the end of that semester, you take out all the stickies from your text/note book! I know, you're all thinking 'nerd-burger', but still, it's gratifying!