I was reading this article on Time's website about D&D and why it's not more popular than it is.
Of course, they mention the problem of the uninitiated person asking, "So, how do you win?"
In the past, every time I've been asked that question, I went into some paraphrase of Frank Mentzer's Basic Set about how there's no win conditions, you keep playing the same character, blah blah blah.
Probably lost more players than I gained that way.
From now on, I'm going to give a simple answer whenever I hear that question.
Q: So how do you win?
A: By playing.