Navigation under normal browsing conditions can be further enhanced for your visitors by the implementation of a 'bread-crumb trail' which provides the viewer with constant awareness of their location in the website directory and easy recourse to step back up the directory.
The 'bread-crumb trail' below the top of all pages at this site illustrates this point. From the current page you can easily navigate back through 'Accessibility' to 'Website Features' and ultimately the 'Home Page'. In a complex, large website the usefullness of this can easily be seen!
Many links have title attributes which describe the link in greater detail, which should appear as a tool tip when your mouse hovers over it.