Use the flow, Luke

The Flow is what gives a CSS master his power. It’s an energy field created by all living things. It surrounds us and penetrates us. It binds the galaxy together.... Oh, sorry.

Flow is what the browser uses to lay out a page of XHTML elements. The browser starts at the top of any XHTML file and follows the flow of elements from top to bottom, displaying each element it encounters. And, just considering the block elements for a moment, it puts a linebreak between each one. So the first element in a file is displayed first, then a linebreak, followed by the second element, then a linebreak, and so on, from the top of your file to the bottom. That’s flow.