I love your avatar, Garden of Earthly Delights, one of my favorites.
I prefer aromatherapy for essential oils. Using a cold distiller is just like ingesting it. It infuses into your system via your lungs and skin. It's pretty efficient.
Also bathing can be a good delivery system, depending on which essential you want to take. Make sure you don't buy crap, essential oils should be a pure as you can get them.