Hand and Boot Warmers!
A hand or boot warmer can make your day more enjoyable not only on the slopes but anytime you get cold. Heat Factory warmers last from 6 to 10 hours.
Good merino wool socks also keeps your feet warm and dry. Don't wear any cotton socks that hold onto moisture which will make your feet cold.
Also getting into dry boots in the morning is essential. Use a boot dryer at the end of the day so you have dry and warm boots.
A good pair of waterproof ski gloves will keep your hand warm.