The clincher: "That's where the opportunity lies to surprise and delight: Find the way to solve a problem that the customer has absorbed as a fact of life, a pain they've borne so long they don't even realize it's there anymore. Those opportunities rarely present themselves as feature requests."

This one reminds me a bit of Joel Spolsky's "Ben and Jerry's vs. Amazon" from back in the day: http://www.joelonsoftware.com/articles/fog0000000056.html

"Both models work, but you've got to pick one and stick to it, or you'll find things mysteriously going wrong and you won't quite know why."

I'll throw out a few of my faves: Joel Spolsky, Adrian Holovaty, Avi Bryant, Cal Henderson, Andy Baio. And of course: Paul Graham.