An olive-and-almond-oil treatment perks up listless locks, says our hair guru friend Philip B. 'Saturate dry hair with the oils, then blow-dry for about three minutes. Leave in for 20 minutes, then brush through hair. Apply a clarifying shampoo and gradually spritz on water until you get a good lather. Rinse throughly; add a deep conditioner.' (Beware if you have semi-permanent colour, however, as this can fade it faster. Fine for permanently-dyed or highlighted hair - and for undyed hair, of course.)