Leverage the fact that you can ask ANY programming related question and always get an answer in less than 5 minutes.
Obviously it's not always true, but it's true enough times.
A little story that will show you how some people will just refuse to come to SO for some reason only they know.
I have a friend who kept asking me Java questions (even if I told him a million times that I've never done Java).. So I just copy&paste what he asks me on Stack Overflow, then link him the answers. He's been very satisfied with them and he kept thanking me.
And yet, the day after he always asked me another Java question. After some time I really got tired of it and told him "just ask on Stack Overflow, I won't help you anymore". He says "OK". 10 minutes later I ask him "What's the link of the question, anyway? I'll upvote it". He says "I'll post it tomorrow". Then later in the day I found out he asked a friend of mine instead (who doesn't know Java either.)