Practice makes it perfect. The practice is very simple: try to pull your pepper spray canister from its usual location, like a belt clip, a pouch, a pocket and aim it toward the supposed attacker. Make sure, the nozzle is pointed away from yourself and in the direction of the target. Make sure your fingers are comfortable with the safety latch and can engage/disengage it readily. Try this practice few times a week, try it with your eyes closed to make certain your body will perform all these basic movements automatically even when in trouble. It's that simple. It's that important.