Jason Fried

After every 6-week cycle, take a 2-week cool down. Not a vacation—a time for people to tighten things up, fix bugs, explore ideas they never had time for. Back-to-back sprints destroy people. Cycles are sustainable.

There's only one outcome available to venture-backed companies: go huge. All the space between small business and unicorn? You blow right past it. If you don't hit the moon, you wither and die.