No one like wilted vegetables. No need to scrap the lettuce next time it's looking like it's seen better days, try throwing it in a cold bath with some lemon and put back in the fridge. Your lettuce will emerge refreshed and ready for use.
Lettuce as limp as a wet noodle? Put it in a bowl of cold water, squeeze in half a lemon, refrigerate for one hour, and blot dry. Perky!