The most important graphical element of any website is its header image. It's the image that will be seen more than any other on your web site, so it's important to get it looking good.
This tutorial gives an example of how to use Adobe Photoshop to make a graphical header image for your web page, that has some button functionality too.
Here's how to go about making an automated photo web gallery in photoshop. It's not the *prettiest* thing, but it's awesome for creating the template files (the pages, resize images, thumbnails, links, etc.) Basically, it does all of the grunt work for you so all that's left is the fun part!
This Photoshop 4 tutorial is quite a big one. We'll show you how to make one of those trendy menus that look like one image, but are in fact several images joined together, with each image changing as the mouse moves over them. Oh, words will never do - take a look at it in action!