Rosemary essential oil is often used for alertness and stimulating memory. Dap a little into a handkerchief or cotton ball and inhale as needed. It can also keep you alert during long car trips or a long day at work. You Might Also Like Flower essences are a larger category of products January 16, 2016 Hypnotherapy May 14, 2014 Aromatherapy for the air and health benefits December 31, 2013