wait and hope! chronic overwatering can cause stunted root growth and rot as well as other problems but those plants don't look too bad other than the wilting. she's a strong plant and can stand up alot of abuse that you might think would kill a plant. i have been suprised a few times when a plant that looks pretty bad comes back and ends up the best looking plant in the closet. try to let the soil dry out a few days between watering. a good thing to do is to lift the pot after watering to feel the weight then just pic it up every day and when it starts to feel really light then it's time to water again. plants can even wilt a little before you water and it doesn't seem to cause any problems, they just perk right up after they get a drink. good luck