Be sure your pages are well linked to each other. Each page should give a link back to your home page. Your home page should link to each major section of your site. In addition, pages in your site can have links to the major section as well. You can have these links in several ways.
Graphic buttons can be very appealing if they are done correctly.
Keep the size small and have them very clearly marked as to what they are. Use the same buttons on each page if you can. This way, they are already loaded, and won't slow down your page's loading time. This is a work in progress. It will be constantly added to, and probably never finished.