I am going to show this site MBoffin.com - Designline - A Design Timeline at the next meeting, but it is so interesting, I thought I should blog it. The writer is contemplating what the process is to create a web page. He shows step by step how he did it. Click on the animated gif to see his progress from HTML to CSS.
I don't know if everyone would agree with his approach, but it is what I have been stressing in the workshop--it all starts with clean HTML, and the CSS gets added on top. Look at how many different looks he can create with the same basic HTML.