Bring Wilted Greens Back from the Dead
Lettuce wilts because it loses water. The key to reviving it is to put the water back in.
First, trim any browned parts and toss them. Fill a large bowl with ice water and submerge for 30 minutes to 1 hour. Remove the leaves by gently lifting them up from the water, blot the greens with a towel, and spin dry. This works for fresh herbs and most leafy greens.
Soaking greens in ice water does double duty—rinsing off any dirt as well as reviving. Swirl the greens in the water when you first add them to remove any flecks of dirt on the leaves. Be sure you only spin them before they soak so as to not disrupt the dirt that settles at the bottom of the bowl.