Keeping a clear head Chew leaves

Chewing one leaf of the common hedgerow herb feverfew (Tanacetum parthenium) daily is a traditional migraine preventative. During an attack, take 5–10 drops of feverfew tincture in water every 30 minutes to ease constriction of the cerebral blood vessels (often the cause of pain). (Avoid if taking bloodthinning medication, such as aspirin.)