Another useful elements to imply direction are images. The direction that objects in the image are facing will determine what direction the visitor will follow. If a person depicted on the image is looking to the right then the correct positioning of the image on the page should be on the left hand side otherwise the visitor will be led to click the back button and 'leave' the page. We tend to do what others are doing.
Images, being dense elements, are best positioned along horizontal, vertical or diagonal lines and preferably surrounded by less dense elements like text.