Yeah, I wish I'd seen the "top ten signs" (#9) a long time ago. It might have saved me from blowing my early 20s on a good idea that I just couldn't execute on. (It was basically Google Base, but with no commitment from the friends I asked to help me, with no successful sites under my belt, and using only the primitive tools of 1997. Oh, and the unworkable resource-cost-to-impression-revenue economics of that era as well.)

I wish I'd also been slapped in the face with the observation (linked to from somewhere on news.yc) that a great idea with no execution is worth about $10.