How to Optimise your Site Structure
The visual structure of your site really is represented by the menu that you have. Of course, permalinks and even breadcrumbs help out here but these are really not things that your visitor or even the person who is looking at your site will take into account. Your menu really does need to consist of a number of top menu options and this will help you to keep the site focused.
In a perfect world, you need to try and keep everything at one sublevel. A lot of sites use secondary menus to try and accommodate for all of the extra content they have and a lot of people also believe that they can’t fit everything into one line of tabs. This is completely understandable, but you really don’t have to fit everything into one navigational option on your tab.
For a lot of sites, the menu starts out with home and then ends with contact. You need to make sure that the pages between these are relevant, and that they make sense to be up there. For example, if you had a site all about marine fish keeping, you would have one tab for predator fish and then one for peaceful fish. You wouldn’t then want to have a third tab detailing what you have in your own tank, because this isn’t informational and it could easily be used as a blog post instead.
Internal pages can really help out with your site structure, and you can build a web of pages without having to have them all in your site tabs. For example, your service page could then have sub-sections on the page for each service you provide, you don’t need to have these on your menu at all and this can really help you to clear up your space.