The most effective way to do it, is to do it. –Amelia Earhart
Thanks to Adam for introducing me to coconut oil.
Wash sweet potato and then pierce it with a sharp knife in several places to allow steam to escape. Rub potato with coconut oil. Bake in preheated oven (425 degrees) until tender. It takes about an hour in my oven. Slit the potato open and sprinkle it with cinnamon. You can add butter but it tastes great with just the cinnamon alone.