For temporary itch relief, a warm bath with a small box of baking soda
mixed in is very nice. Sit and
soak for a bit, then get out and
air dry yourself. It will drastically cut down on the itching, but isn't strong enough to generally aid in healing.
Things I've learned to avoid: Moisturizers, oils, and overexposure to tapwater. Moisturizers make this stuff spread so quickly that you could see a week's spread in a single day. Oils have a similar, yet less powerful effect.