29. The Volumizing Spray — Locks feeling limp and sad? Pump some life into tired tresses with a hit of volumizing spray — it will lift the roots and help give you a great foundation for an updo.

John Frieda Luxurious Volume Blow Dry Lotion Root Booster Weightless Spray, $5.99, available at Drugstore.com; Serge Normant Meta Lush Volumizer, $23, available at BeautyBar.