This is the step where you make all the pictures for your site, of course you'll have to have a name for your site by this stage.
A tried and true method is to make a 1000x600 picture make everything your site will be, take the instructables site for example all it really is is a banner at the top, the orange bar with the buttons, and a few menu bars.
Just make the entire thing as a single image (just leave out the content area, i.e. where the text is on the middle page, just leave that spot blank) and don't make a background,just fill the background with a solid color that goes well with your page.
I'm not going to tell you paint tips or anything you can look at that on your own. once you have what you want your main page to look like. once your done. cut and paste everything that can be clicked, including the banner and buttons individually into a new window, and save it separately make sure to save them as a .png, look at the pictures for an example of mine. The point here is to separate everything so you can code it.
- Another hint is to make a new folder to save them in, not needed but for organization.