Make sure all your labels/brands match. If you wear Nike trainers, Reebok socks, Adidas bottoms and an Under Armour top she will treat you with disgust and contempt, and rightly so! Wear all one brand and they'll be round you like bees round honey.
Try and co-ordinate colours too. General rule is that all accessories must be same colour - my killer tip is to colour match the stripes/graphics of your trainers with your top and colour match the main colour of your trainers with your bottoms: it makes you irresistible and incredibly suave looking next to those buffoons in stringers and grubby hoodies.
Let us know how you get on