Instead of grabbing for the aspirin, you might be surprised to learn of greener ways to heal a headache. Most of the time, we get headaches because our bodies are dehydrated, so be sure to drink plenty of water throughout the day. Rosemary has been noted to calm and relax nerves, so grab a few sprigs (many people grow it as decorative shrubs, so it's easy to find), rub them in your hands to get the essential oils on your skin and breathe in.