The document lists the top 10 mistakes to avoid when designing websites. These include: having too much text or too many pictures on the front page, using a picture as a background, employing nasty color schemes or fonts, including links that aren't obvious, making pages too big requiring scrolling, using text that is too small or too large, including rubbish sound or music that can't be turned off, and overusing animations. The key is to make websites easy to read and navigate.