Apply in the morning and again before any event that may have you sweating a little bit more. Your underarms will thank you, and so will your coworkers! Store in a cool, dry place away from direct sunlight.
Pro Tip: Chill for 30 minutes prior to first use to avoid flaking/crumbling. Once the deodorant has been used one time to form to the shape of your underarm, you should not experience any flaking.