A website has a left navigation and a bread crumb. The left navigation is an exact copy of the bread crumb (or the other way around). They both take up valuable real estate on the screen.
My idea would be to do away with the bread crumb because the visitor sees at any moment where exactly (s)he is in the website in the left navigation. By eliminating the bread crumb, the amount of "real content" would increase by 10% and people would have to scroll less and less frequently.