I agree with Britt, having your own website helps a lot. (Saves you from the trouble of bringing around your portfolio, too, at times.) This doesn't just apply to photography, too. Keeping a database of contacts and potential clients also help. Mingle with people. Talk to others in related fields. You'll find that word of mouth really goes a long way. My friend would tell me, never tire of contests (as long as you don't mind not winning). You'll never know if you're going to get your big break and/or recognition when you join those things. (*