Simply put: don't take them in class! Seriously. They become a huge distraction. You will start playing on Facebook, playing computer games, doing anything but paying attention. And honestly, we know what you are doing. When your keys are tapping, and the professor is really saying nothing----busted.
Also, I heard once that in order to remember something, the fact must have touched your mind at least 4 times. So, if you hear it, then write it, then take your notes and type it in review later that week or evening, and then place it in an outline-----4 times. And good study habits.
Resist temptation! Leave the laptop at home.