Step 7: Hydrating Serum In the morning I reach for a brightening vitamin C serum, but at night (which is typically when I do my extended facials) I use a hydrating formula, like the Drunk Elephant B-Hydra Intensive Hydration Serum ($48), and pat it into my skin. Image Source: sephora.com Drunk Elephant B-Hydra Intensive Hydration Serum $48 from sephora.com Buy Now