12 Rules for Web Menu Usability

1. Menus must be considerate of the user’s main task
2. Menus must be distinct from content
3. Menus must be clearly readable
4. Menus must be easily scanned for information
5. Menus must be easily operated
6. Menus must behave as your target user would expect
7. Menus must load quickly as possible
8. Menus must be consistent across a site
9. Menus must put a higher premium on usability than branding
10. Menus must be localizable
11. Menus must be accessible to the handicapped
12. Menus must work on multiple browsers
(Usable Web Menus By Andy Beaumont, et al. Glasshaus, ISBN: 1-904151-02-7)