Well, I would hope that if you follow the first step (work as an apprentice), it would get you in the habit of requesting code reviews, even when you've entered

Well, I would hope that if you follow the first step (work as an apprentice), it would get you in the habit of requesting code reviews, even when you've entered "the guild." It's also worth noting that code reviews should be two-way streets--that is, more junior programmers should review more senior programmers' code, even if for nothing more than a learning experience.