As Taylor points out in an enlightening Harvard Online post, 37signals lives as a company by the same principles it embraces in its productivity software: non-complex, do more with less, solve simple problems better than anyone else.
As company founders Jason Fried and David Heinemeier Hansson tell Taylor:
"When you're competing against companies that have so much more, the only answer is to do less ... do less than your competitors to beat them. Instead of one-upping other companies, one-down them. Instead of out-doing other products, under-do them."37signals has accomplished that mission with products including BaseCamp, a practical project management program; Highrise, for managing contacts; and Campfire, a real-time group chat app. Its target audience is not the Fortune 500 but rather the Fortune 5,000,000, which Taylor articulates as "software for entrepreneurs and small companies where the executives who buy the product also use the product."
The do less to do more mantra is part of 37signals' corporate DNA. It recently switched to a four-day work week to keep employees fresh and focused.
If you feel that you are trying to do too much with your business -- creating too many products, serving too many customers, hiring too many employees, working too many hours -- the 37signals story might be a good antidote.