I could summarize them, but that might take the fun out of reading them. All these posts are absolutely worth your time.

All strategies are note equal – From The Head of Zeus Jones

Cutting Clippings and Musings on The Same – Talent imitates, genius steals (Faris Yakob)

The Ethics of Online Secrecy – The Blog of Mike Arauz

Designing for failure – Alexander Chung

56 Sage Street: the story behind the game – BBH Labs