A simple guide to CSS positioning
BarelyFitz Design has written up a very nice explainer on how to position elements through CSS. Their step four is probably the one that is most easily forgotten: Combining position:relative with position:absolute. In a nutshell, setting a ‘relative’ position on the container element will allow you to position subelements absolutely within that element. And the explainer goes to show how this method can be used for two- or three-column layouts that rival the traditional methods of floating elements.