I have a giant whiteboard on the wall (~6ftx4ft), a smaller one as a table top (4ftx3ft) and a 4 month white board calendar on another wall. Also have Google Calendar that syncs to my iphone, a schedule in OneNote and a To-Do list on OneNote.
I also have a white-board that's small enough to fit in my bag. That way I can write out structures and mechanisms on the go. (Or at least between classes.)