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 Essential oils to help calm anxiety September 10, 2013 Essential oils that can help with asthma include eucalyptus November 18, 2014 A Diamond is a stone of great power December 19, 2014