The 7 Founding Sins

David Beisel lists the 7 Sins for would-be entrepreneurs.  Not sure I completely agree on point #1.  While entrepreneurs certainly need to be intimately familiar with the problems they're trying to solve, I also believe great entrepreneurs can search for great ideas.  The stuff that's come out of Bill Gross and his Idealab is probably Exhibit A here.  While they got a lot of flak during the dotcom boom and bust, what got lost in all of it was the great ideas (and companies) that they spawned: Goto (Overture) -- the idea of having sponsored search results was a bold one, Snap, Citysearch, and several others. 

I'd also add Control to the list.  While it's natural for early stage entrepreneurs to exert a great degree of control, it can make it hard to grow.  So surrounding oneself with great people who share your vision and trusting them seems a lot more scalable.