Build Web Pages from the Top Left Corner Down
There are two important reasons to build your website from the top left hand corner down.
The first one is that this is the way people (at least in the western world) read pages. They tend to begin at the top and read towards the bottom. And they tend to look at the left column before they look at the right. This is why your web pages should contain the most important headlines and descriptive information near the top.
Some designers fall into the habit of creating a standard "image oriented" header to appear on all the pages within a site, in order to give it a consistent look....