'Meetings are toxic', 'Don't be a hero', 'Fire the workaholics', 'Interruption is the enemy of productivity', 'Build an audience', 'Good enough is fine', 'Go to sleep', 'Pick a fight', 'Planning is guessing' ... are some of the topics explained within the 37signals founders work manifesto.
This irreverent, but very concrete and clever book is definitely a must read.
It tastes like 'The Pragmatic Programmer' manifesto, but applied to the company level.