Dry skin. This is particularly common on elbows, knees and heels and must be regular applications of a rich moisture cream. Rub it in every day after your bath or shower and again at the other end of the day.
Oily skin. This is typically the upper chest and back found and must conscientiously cleansing. Use foam, a body brush or Loofah or an abrasive sponge on a long handle, really clean to those sections when you bath.