The essence of a website is self-service. There are three core things that self-service needs to get right: convenience, speed, and price. Convenience means task achievement with minimum effort. Speed means that you get in and out of a website as quickly as possible. People are cheap on the Web.
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Advertising agencies tend to design awful websites because they are obsessed with getting attention. When people come to your website, you have already got their attention. They want to do something. They want detail. They want facts. The thing they value most is their time. So don't waste it.
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The average advertising agency fundamentally doesn't get the Web. Saatchi & Saatchi, BBDO Worldwide, J. Walter Thompson and Ogilvy are great advertising agencies. When it comes to managing their own websites, however, they are rank amateurs. They bring their print and TV thinking to the Web with em...
If your website tries to be all things to all people, it will fail. It's very easy on the Web to try to do too much. You need to relentlessly focus on what most of your readers do most of the time. Don't let anything else get in the way.