1. Speak the users' language. Use words, phrases, and concepts familiar to the user. Present information in a natural and logical order.
2. Be Consistent. Indicate similar concepts through identical terminology and graphics. Adhere to uniform conventions for layout, formatting, typefaces, labeling, etc.
3. Minimize the users' memory load. Take advantage of recognition rather than recall. Do not force users to remember key information across documents.
4. Build flexible and efficient systems. Accommodate a range of user sophistication and diverse user goals. Provide instructions where useful. Lay out screens so that frequently accessed information is easily found.
5. Design aesthetic and minimalist systems. Create visually pleasing displays. Eliminate information which is irrelevant or distracting.
6. Use chunking. Write material so that documents are short and contain exactly one topic. Do not force the user to access multiple documents to complete a single thought.
7. Provide progressive levels of detail. Organize information hierarchically, with more general information appearing before more specific detail. Encourage the user to delve as deeply as needed, but to stop whenever sufficient information has been received.
8. Give navigational feedback. Facilitate jumping between related topics. Allow the user to determine her/his current position in the document structure. Make it easy to return to an initial state.
9. Don't lie to the user. Eliminate erroneous or misleading links. Do not refer to missing information.
For more information click :http://stats.bls.gov/ore/htm_papers/st960150.htm
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