Don't Make Me Think, Revisited: A Common Sense Approach to Web Usability

by Krug Steve

Preserve the distinction between visited and unvisited text links. By default, Web browsers display links to pages that you’ve already opened in a different color so you can see which options you’ve already tried. This turns out to be very useful information, especially since it’s tracked by URL, not by the wording of the link. So if you clicked on Book a trip, when you see Book a flight later you know that it would take you to the same page.

Don’t float headings between paragraphs. Headings should be closer to the text that follows them than the text that precedes them. (Yes, I know I mentioned this is Chapter 3, but it’s so important it’s worth repeating.)