White clover: medicinal uses: cleanses blood, boils, sores, wounds, etc., heals disorders and diseases of the eye. A tea is used to treat coughs, colds, fevers and leucorrhea. A tincture of the leaves can be applied as an ointment for gout. A tea of the flowers used as an eyewash.
The last works well with studying! I always studied right before sleep and would even put my book under my pillow so my subconscious self would be 'reminded' of my studying. I regularly would wake up going over the details of the information.