Also from HFI. Because I like checklists.
1. Motivate: Design your site to meet specific user needs and goals. Use motivators to draw different user “personae” into specific parts of your site.
2. User task flow: Who are your users? What are their tasks and online environment? For a site to be usable, page flow must match workflow.
3. Architecture – it’s 80% of usability, Build an efficient navigational structure. Remember – if they can’t find it in 3 clicks, they’re gone.
4. Affordance means obvious: Make controls understandable. Avoid confusion between emblems, banners, and buttons.
5. Replicate: Why reinvent the wheel? Use ergonomically designed templates for the most common 8-12 pages.
8. Know user tolerances: Users are impatient. Design for a 2-10 second maximum download. Reuse header graphics so they can load from cache. Avoid excessive scrolling.
9. Multimedia – be discriminating: Good animation attracts attention to specific information, then stops. Too much movement distracts, slowing reading and comprehension.
10. Use a stats package: Monitor traffic through your site. Which pages pique user interest? Which pages make users leave? Adjust your site accordingly.