Make sure that the entire form can be navigated and completed using only the keyboard to make sure that people who do not use a mouse (which includes people who use screen readers and people with limited mobility) can use the form.
Also make sure that all form elements include a label element like this:
<label for="firstname">First Name:</label>
<input name="fname" id="firstname" type="text" />
If you do not include a label, it is virtually impossible for a user of screen reader technology to complete the form.
Note: If you are using the "webform" content type in the KU CMS, labels are added automatically.