Wow. Thanks for putting my presentation on Hacker News. I believe this is my first appearance here. :) If you have any questions, feel free to ask! (p.s. thanks Jerome for jumping in! that's why he's an amazing cofounder!)
And point taken re: stock photos, not putting all of the points up front (more for the audiences sake) and using Guy Kawasaki's stuff...
I m afraid there are uncountable number of possible mistakes, on top of the ten you have stressed. And all those mistakes usually occur due to sticking to rigid rules rather than trying to be flexible at different stages of business lives, but some occur due tho being flexible rather than having rigid principles.
And point taken re: stock photos, not putting all of the points up front (more for the audiences sake) and using Guy Kawasaki's stuff...