90 percent of the problems found in forms solved in a few hundred precious words.

• Use sentence case for labels, hints and error messages. It’s easier to read and spot nouns. Use a verb for button text because the user is doing something.

• Be tolerant of mistakes like extra spaces, dashes and slashes. Do the hard work so users don’t have to.

• Prefix the word “Error:” to the document’s title. It’s the first thing announced by screen readers when the page loads.

• Tell users what they need and how long the form will take to complete before they start.