LAVENDER: Lavender is known to reduce anxiety and emotional stress while promoting relaxation and calmness It is also associated with the alleviation of headaches. Long, hard day at the office? Shake off that stress with the help of this soothing and relaxing oil. Keep this oil around for these extra-overwhelming days. Your body will thank you. PEPPERMINT: Peppermint essential oil gives a cooling sensation and has a calming effect on the body which can relieve sore muscles when used topically.