9. Use a toothbrush to fake fuller hair
 Never smooth the roots of fine or thin hair while blow-drying, says Mancuso. “This causes the hair as a whole to collapse and flatten,” he explains. Instead, tousle the hair from root to crown with your fingertips as you blow-dry. Then, when your strands are dry, give the roots extra lift by back-combing their undersides with a clean, dry toothbrush. Rather than tearing at hair like a comb, the soft bristles will grip and rough up strands just enough to maintain lift.

10. Steam-curl your spirals 
To create soft, old-Hollywood waves, most professional stylists use a large-barreled curling iron. But those irons are hard to wield effectively (not to mention safely) at home. What to do? Caruso steam rollers ($38–$50; drugstores) create big, bouncy Ava Gardner undulations, says Abergel. Even better, they won’t singe your skin.

11. Prevent roof poof
 The sexiest tousled looks today (think Gisele Bündchen or Sarah Jessica Parker) are straighter at the roots, with waves that don’t begin until the temples. To achieve this, Abergel suggests you channel Roger Federer: Don a terry cloth headband over damp strands; then, as the hair air-dries, the band will pull it straighter root to ear.

12. Treat your hair with moist air
 We usually think of humidity as hair’s archenemy, but parching -dryness is worse. If you regularly experience dry air—from either working in a building that pumps it in (cool or hot) or -living in that kind of climate—your hair will become parched, says Christopher Cilione, a colorist at the Oscar Blandi Salon. Moisturizing hair products help, he says, but not as much as regularly running a humidifier.

13. Flatten flyaways fast 
Stylists have a dozen tricks to flatten stubborn flyaways. Here, our favorites: Pat them down with a fabric softener sheet, says Richard Marin, Remington’s consulting stylist. Apply lotion to your hands, then, while your palms are tacky, smooth the strands, says Jeffrey Paul, a celebrity stylist. Coax them south by combing them with John Frieda Full Repair Flyaway Tamer ($10; drugstores), says Simone Mangano, a colorist at the Serge Normant Salon in Manhattan.