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 Avoid costly and dangerous anesthesia with pet dental cleaning May 11, 2016 Pyrite August 8, 2013 Aromatherapy Essential Oils that help with Insomnia include Lavender June 28, 2016