The Bike Shed: 1: Sandi & Derek's Rules

Sean and Derek discuss lessons learned from following Sandi Metz' rules on a project and the overall impact of rules on code.

Sandi Metz' Rules
Ruby Rogues, episode #87, where Sandi tells us the rules at 1 hour, 18 minutes, 27 seconds in.
Practical Object Oriented Design in Ruby, or POODR, is an excellent book you should all check out.
God classes
thoughtbot's Ruby style guidelines wherein we disavow ternary operators and conditional modifiers.
The facade pattern
Guard clause
Ruby's method_added method.