I'm not sure how seriously I should take this advice when the authors website looks like this:
* Useless stock icons are way bigger than the text describing them
* Horrible use of white space
* Weird margins and padding
* Constantly moving animation at the top right
* Tacky quotes like "We will not rest until you have a site to be proud of."
* Only 2 clients ever (and only one of them even has a screenshot)
* Their RSS feed names their blog "BLOGNAME".
I'm not attacking the site, just listing the things that jumped out at me.
And btw, good developers might not be good designers!