Create a new document 800x600 and fill you background layer with the color "#262626?. Create a new layer and label it "header", select the rectangular marquee tool and make a selection at the top of your canvas like so.
Select your gradient tool and fill with a gradient.
Create a new layer "under" your header layer and label it "colored bar", Select the rectangular marquee tool and draw a smaller rectangle under your header and color it with an orange gradient. Then add a 1 pixel black stroke to it. you should have something like this.
Add your title, slogan, logo and navigation.
Now select the rounded rectangle tool and draw out an area for your main content and apply a 1 pixel orange stroke to it.
Add some content and label your main area box.
Now to finish it off add your important information into a footer.
