Question: what essential oils are best to diffuse?
Answer: Clary Sage. Clary sage essential oil is believed to be beneficial for hormone balance, insomnia, and other symptoms of PMS. ... 
Lavender. The wonderful essential oil of lavender is well known for its calming, relaxing and balancing effect on the emotions. ... 
Lemongrass. ... 
Ylang Ylang. ... 
Peppermint.