“At the end of every interview someone inevitably asks ‘Where do you see 37signals in five years? Ten years? 20 years?’ My answer remains the same: ‘Still in business. Beyond that I have no idea.’

Five years ago I had no idea we’d release Basecamp. Four years ago I had no idea we’d release Ta-da List. Three years ago I had no idea we’d release Backpack or Campfire. Two years ago I had no idea we’d release Highrise. Did I ever think we’d write another book? Not until we started it. And what about next year? I’m not entirely sure what we’re going to be working on.”