Leave-in products are especially helpful as I don't wash my hair several times a week (and definitely don't blow-dry or flat-iron it multiple times). Instead, I lean on creams like this Reverie Milk Anti-Frizz Leave-In Nourishing Treatment ($42) for added conditioning between shampoos. This one gets its power from essential oils and plants like coconuts, olives, and almonds, and it helps detangle straight out of the shower plus reduces frizz when I'm dry-styling, too.