I have extremely dry skin. I use to lived in a desert area for a while where I had the hardest time controlling it. I found it best to take a hot shower and then cover your self with Vaseline from head to toe. It's also better to wear pajamas that cover most of you skin, so that the Vaseline doesn't rub off on your bed sheets.
You will wake up with incredibly soft skin. It really works. The Vaseline can be substituted with Johnson baby oil gel it works exactly the same. If you have dry feet just put on some Vaseline on and wear socks to bed. Softer skin is waiting for you, try it.