Navigational design should draw upon the basic organization structure of the site and the site landmarks - important areas and sections of the Web site. Site paths should be no more than 3 clicks in length for average size sites. Repetition Navigation plays a role in defining the character and identity of a site. Navigational elements should be carried throughout the entire site to tie content together. Providing repetition also increases predictability and comfort for the user.
Navigational elements can also assist the user to understand the context of a site.
An example of this is E-Online , which uses colored buttons navigation and matching colored background to define sections of the site. This is repeated for each page within each section. If links take you to another section, a user is aware of it by the changing color scheme. Language One of the hardest parts of navigation design is terminology. The way an item is labeled effects the usability of the site.