Shine sprays and serums add instant gleambut one formulation doesn't fit all. If your hair is thick, coat it (while wet or dry) with a rich silicone solution that also has hydrating oils, such as argan. If your strands are on the finer side, spritz on a lighter silicone-free mist after styling, which won't weigh down hair.
For fine hair, Kérastase Elixir Ultime, $54; kerastase-usa.com. For thick hair, Mizani Gloss Veil Shine Spray, $16; at Ulta stores.