My favorite tip is "Stay to the left". Most people, being right handed, always move to their right without even thinking about it. Wherever there are multiple lilnes, moving to the left will almost always get you in a shorter line. Entering EPCOT one day, there were lines at all the gates. We walked as far left as we could and found almost nobody going in through the gates all the way on that side. Human nature can be a strange thing.