When storing lettuce (after washing) in the refrigerator, put a damp paper towel on the bottom of a plastic container and one on the top. Helps to keep lettuce crisp and last longer. Can be used on leaves or torn pieces, even in salads.
Another hint: when making fresh lettuce/spinach salads, don't add the tomatoes. Serve them separate. That way if you have to put any away, the tomatoes won't wilt and create a bad taste for your lettuce. - Submitted by Danya