Take a sort of Yoda/Buddhist approach to material possessions - don't get attached.
Non-attachment is about overcoming your desire for things and ideas. Craving the latest trends will bring you nothing but temporary coolness (the illusion of happiness) followed by the state of being passé (suffering) along with credit debt.
A trend in itself is temporary and tends to generator waste. The Jedi stylist is patient. Acquiring only what is timeless and make do in the mean time.