I think these 37signals blog posts are great!
I can't think of a single idea of theirs that I've adopted (some of them seem downright silly), but that's not the point. Their "against the grain" thinking adds a little perspective against all the corporate mind-numbing B.S. I'm so accustomed to seeing. These are people trying things out and sharing with us, not just some ivory tower "experts".
Very refreshing. Keep 'em coming.