We don't write on the board much, but you should write down what's said in lecture anyway. A lot of the material also needs to be rethought and viewed differently after subsequent lectures-can't really do it if you don't have a record. More rewarding for both of us that way. Become pals with at least one person in class. If you have to miss a class, you can catch up much more easily-find out what you missed etc.
Study groups can be useful too.
Become pals with the teaching assistants. They are smart and have good tips for studying etc. They also remember what it was like to be an undergraduate in a large lecture class. They assign a note taker to the class, and then sell you the notes. We allow them to take notes in this class, in the event you find their notes helpful.