I often find myself leaving sites because I'm just clicking and clicking to get to the information. The 3 click rule is a really good tool and I think it should be used more often.

Most of the time when I'm developing a site I automatically stick to it. If you just design a clear navigational structure before you begin with designing the site it's pretty easy.

There are more sites using the 3 click rule than you would think, one great example is the ikea site.