Clove oil is great to use for toothaches. You can make your own by mixing together equal amounts of whole cloves and vegetable oil and allowing it to sit for several weeks. I use this oil as an addition to my potpourri pot when simmering scented water. Cinnamon oil can be made the same way. Simply pour the oil over cinnamon sticks and allow to sit for several weeks. Not only does this save you money, but these oils are handy to have around.