Essential oils are what gives plants their scent and can protect them in different climates and environmental conditions. Extracted, these oils emit pleasant aromas that some people say reduces tension and stress. You can also use these oils on your skin, or even as a cooking ingredient. Some of the most common oils are derivatives of lavender, peppermint, eucalyptus, lemongrass, and cedar, though there are countless others available. If you’ve thought about trying essential oils but don’t know where to start, here are some tips to help you find your first set.