If these people can quickly find the information they are looking for, then they should be able to do so again the next time they visit. One way to do this is to avoid defining main subject pages or categories as acronyms. Although acronyms are short and convenient, they are usually foreign to newcomers. Make sure that you try to differentiate between different types of pages to help visitors keep track of where they are. This can be achieved by using slightly different layouts, graphics, or link position for each type of page.
Graphics are an excellent way to identify where a visitor is in a site.
However, graphics should be kept simple - avoid too many animated images, large images or busy backgrounds. Total graphics on a single page should not exceed 50 K. Repeat background images and other graphics when possible to decrease download times and to help assure the user that they are still on the same site. These will depend on the size of your site. If your site consists of only a few subject pages and a main index, you will probably want to include links to all the pages on every page. However, if your site consists of a main index, secondary indices and subject pages, you may wish to only repeat links to the secondary indices and main index.