The Best Cut: A bob with defined edges gives some heft to limp, straight hair. Long layers around the face can add softness, but be judicious—too many layers will make hair fall flat. Consider lightening your color by two or three shades, says Dorram. Peroxide swells the hair shaft, making your hair feel thicker.
The Best Shampoo and Conditioner: Excess oil is often an issue for fine-haired women because their scalp has an abundance of hair follicles—and thus more oil-producing sebaceous glands. So wash your hair every day with a shampoo containing astringents like rosemary or tea tree oil. Avoid overconditioning. A great trick from Lloyd: In the shower, massage shampoo only into your scalp. Apply a light conditioner on the ends. Then rinse out the shampoo and conditioner together. The shampoo lather pulls away dirt and oil and just enough of the conditioner to keep your hair smooth but not flat.
The Best Styling Regimen: Your cocktail of choice is mousse spiked with a shot of gel. Combine the two products (a dime-size squirt of gel and quarter-size dollop of mousse) in the palm of your hand, and massage the mixture into your roots with your fingertips. Then blow-dry with a wide-barrel round brush, lifting your hair up and away from the roots. (Lloyd finds that drying hair on a low speed helps plump it up.) For extra oomph, once hair is dry, put in a few Velcro rollers. Place each roller against your scalp, then wrap your hair around it (rather than winding hair from the ends); leave them in for ten minutes. For a midday (or early evening) boost, spray a dry shampoo on your roots, then bend over, spritz the underside of your hair with hairspray, and flip your hair back.