Books by Basecamp - 00:13

Shape Up: Stop Running in Circles and Ship Work that Matters - 00:17

Ryan on Twitter - 00:19

Breadboard on Wikipedia and in Shape Up - 6:30

Forrest M. Mims III on Wikipedia - 7:00

"Planning is Guessing," our episode featuring Jason Fried on six-week cycles (his segment starts at 10:03). See also his Signal v. Noise post, "What six weeks of work looks like" - 13:20

"Bets, not Backlogs," a chapter in Shape Up - 16:17

The section on appetite in Shape Up - 17:13

The section on the circuit breaker in Shape Up - 19:16