- All images require an alt attribute.
- All form input elements must have a label.
- The header cells of a data table must be marked as header cells using <th>
- Every page needs a title.
- Color is not used as the only visual means to convey info.
- Use visual cues to focus users attention on the main purpose of the web page. Hard to measure, objective best practice.
- Make fonts readable.
- Limit the cognitive skills needed to use a web page. How to know the limit?