I have certain mantras that I use to guide my programming. They generally revolve around this theme: "Thinking is hard, and I'm not very good at it; every block of code should be simple and obvious, because if it makes me think, I'll probably screw it up and break something." It's a good rule for me, and a good general guideline, but it's a little vague to implement as a policy.

Erikas company wanted to implement this idea as a policy, so they set a limit on how many lines could be in a single method. The thinking was that if each method was short- say, under 100 lines- it would automatically be simple(r), right?

Well, Garret, down the hall, wrote a method that was three hundred lines long. During a code review, he was told to refactor it to simplify the logic and comply with the policy. So he did.

public void Update()
{
  UpdateSection01();
  UpdateSection02();
  UpdateSection03();
}

http://thedailywtf.com/articles/the-refactoring