This document discusses common mistakes to avoid in web design. It identifies three main don'ts: 1) Putting content too deep within multiple links on a site, which loses stickiness and annoys customers; 2) Using too many clashing colors, which discourages viewers; 3) Making sites complex with excessive scrolling and too much content per page, which makes content difficult to find and read. The conclusion states that avoiding these mistakes and having good content will lead to a successful site.