Nibble your Lip

When you know he's looking your way, and you can see him staring at you from the corner of your eye,lightly nib on your bottom lip and gaze somewhere random fr 2 seconds-then act as if you've landed back on earth and take a glance at him.

Trust me-it works..I've done it on 5 guys, 2 came up to me and started a convo, whereas the other 3 looked back with a flirty grin [lol]