As soon as you remove from the oven, take the loaves out of the pan (more recently I like to let them sit in the pan for 20-30 minutes, to steam). Brush the breads with a little oil on all sides. Important thing to know - if you grease them with oil, the crust will remain crispy, if you brush with water, the crust will be softer.
Cover with a towel and allow to cool.