Try wearing a hat or a nylon stocking over your locks when you sleep. The Knotty Boy Recycled T-Shirt Dreadbands work like a charm for this. If they are long enough, you can tie them back with an elastic and then put a nylon over top. Other than that, you'll just have to have patience until they grow a bit stronger and tighter, and use the wax to fix them up in the morning.