1. Frequent rendezvous with a colorist or trysts with a flatiron leave hair porous. The protein in Aveda Damage Remedy Intensive Restructuring Treatment ($26) seeps into weakened areas, fortifying hair. As with all masks, if your hair is very brittle, coat it from roots to tips; the fine-haired should avoid the crown.
2. & 3. Coarse hair requires a thick, emollient-rich formula. The intense moisturizers in Privé Formule Aux Herbes Intensive Mask ($25) and Skin an Apothecary French Hair Paste ($25) seal the hair shaft to spin strawlike strands into silk.
4. When you have the time (and no possibility of a surprise guest), slip on a granny-style plastic shower cap after applying a mask and sit tight for 15 minutes or so. Trapping heat (direct a quick shot from your hair dryer under the cap for a little extra) helps liquefy the conditioners, intensifying the treatment. Each single-dose, panthenol-packed jar of Alberto V05 Total Hair Recovery ($5.50) comes with its very own plastic topper.
5. Do deep conditioners leave your hair feeling more limp than luxurious? Try J.F. Lazartigue Moisturizing Mask ($51). Massage it into damp hair and let the coconut oil sink in before you shampoo away any residue that could weigh down hair.