First, work some dry shampoo through your hair, you'll get volume and soak up any greasiness.
Then, use a little texture balm, warm it up in your palms and really work the product into your strands. Too much will actually weigh your style down so less is definitely more here.
Flip hair upside-down and scrunch hair using a spritz of spray gel. You don't want loads of frizz to take your look from sexy to sloppy.