Well, every day, we have people registering an account. Most people only make one or two posts, to ask a question and say thanks. What we, with "we" I mean the current membership, can do is welcoming those new people, talk to them, make them feel comfortable and at home. Even if you don't really know the answer to their question, you can still say something to them, to let them know this is a friendly community, e.g. something like "Hi X, I don't think I can help you with your problem, but I'll be here waiting with you until someone who does know the answer shows up. In the meanwhile, [ask a question à la "which TW games do you play"].