Clearly label the structure and groups. Guidelines B.1-B.3 address these issues. For frames, provide sufficient information to determine the purpose of the frames and how they relate to each other. Group controls, selections, and labels into semantic units. C. Good Practices Maximize usability by following good design practices.
Good design is accessible design and vice-versa.
For instance, many of the practices that lead to more accessible pages also make them accessible to indexing engines as well as more usable by all users. Good design practices include consistency, generality, simplicity, reuse, and validation. Only use technologies defined in a W3C specification and use them in an accessible manner. Where not possible, provide an accessible alternative page that does. Provide mechanisms that facilitate navigation within your site.