Most users are unable to solve even halfway complicated problems with search. Better to redirect their efforts into more supportive user interfaces when possible.
Ordinal sequences, logical structuring, time lines, or prioritization by importance or frequency are usually better than A-Z listings for presenting options to users.
New user testing of site maps shows that they are still useful as a secondary navigation aide, and that they're much easier to use than they were during our research 7 years ago.
One line of text shows a page's location in the site hierarchy. User testing shows many benefits and no downsides to breadcrumbs for secondary navigation.
To manage a huge, worldwide information space, users need proven features like fat links, typed links, integrated search and browsing, overview maps, big-screen designs, and physical hypertext.
Users will often overlook the actual location of information or products if another website area seems like the perfect place to look. Cross-references and clear labels alleviate this problem.
Textual links should be colored and underlined to achieve the best perceived affordance of clickability, though there are a few exceptions to these guidelines.
People get lost and move in circles when websites use the same link color for visited and new destinations. To reduce navigational confusion, select different colors for the two types of links.
Spare your users the misery of being dumped into PDF files without warning. Create special gateway pages that summarize the contents of big documents and guide users gently into the PDF morass.