I Used The Web For A Day With Just A Keyboard
“By far the most common keyboard accessibility issue I’ve faced today is a lack of focus styling for tabbable elements. Suppressing native focus styles without defining any custom focus styles makes it extremely difficult, even impossible, to figure out where you are on the page.”
Really great summary of an experience of using only your keyboard to surf the web. It's important to think about as you build and maybe even try this yourself to understand the frustrations and difficulties many people encounter every day.