- Underestimating the cold start problem.
- Focusing on too many things.
- Lack of sustained execution.
- Pointing the finger when missteps happen.
I like the example he uses for #4, at how Digg rescinds their initial stance. Of course lately, it's not only Digg that had to make an apology to its community, but personally, I find that Six Apart could have taken a page from How to Say I'm Sorry.