Flashing him a smile might be a good start and so is wearing some trendy outfits; just be careful not to send the wrong message here. Another good tactic is to chat with his buddies as this makes it much easier to talk to him because you're already hanging with his crew. Get more tips from http://www.ehow.com/how_9572_man-notice-you.html.
Be courteous. Smile. Act like a smart girl (yes, guys like girls with a brain) and don't take everything too seriously. But just a little advice if I may: don't spend too much time trying to be noticed by a guy. It's a lot of useful energy lost and more troubles to your heart. Put you first!