This isn’t really linked to photography however I thought I would add this for reference material. I found a couple of interesting web pages while searching around, looking for design hints for web sites.
19 Things NOT To Do When Building a Website
has an excellent list of “things not to do when building a web site”, funnily enough. The author talks about these areas and gives reasons why certain design features are a bad idea. If you are designing a web site or having someone design one for you, it’s an essential read.