Once you start creating pages, one of the first things you will want to add is graphics.
Humans are visual animals and graphics can totally change the character of a page.
Long, thin graphics can be used as separators. If you want to go the free route, one particularly interesting place, from an educational standpoint, is a site called Jelane's Free Web Graphics . You will find many nice images there, along with some great educational material on creating your own. A-1 All Free Clip Art , DEWA Free Graphics and The Free Graphics Store . You can also visit The Free Site , Web Places and Free Graphics for directories of free image sites.