Veerle Pieters has a fantastic step-by-step tutorial on creating Header Backgrounds in Photoshop. She proves that inspiration can indeed be found in photographs as she creates an awesome header graphic by applying some Photoshop magic to an existing photo. By the way don’t let the formatting of this tutorial confuse you-there is no text on the first page of it, and you have to click through using the “next” link and continue to subsequent pages. Despite this navigational hiccup the tutorial is quite good as it emphasizes a visual explanation process for creating header backgrounds, and it is very easy to follow for that reason.