Keep the nomenclature of the website navigation common. People are used to seeing things named in traditional ways (home, services, about, etc.). Becoming too existential with the titles of the navigation can confuse and frustrate the visitor.
Make sure plain language is being used wherever possible when creating website text.
Make sure there is proper contrast between the text and the background. If there is not enough contrast it can be very difficult to read the website text.
Check the order of information to ensure it is natural and logical.
Confirm that users can easily recover from errors, unintended actions, or actions that did not lead to desired results.
Be sure images are provided for important concepts.
Ample white space should be used to separate ideas.
Always try to use well-known pictures and symbols, e.g. “?” for help; “<” for back; “i” for information.
Try to remove any unnecessary material from the website (i.e. clutter).
It is critical that the site loads quickly. Do not make a visitor wait for website pages to load.