One of my favourite ways to use facial mists is to give my skin a spritz post-cleansing, before I apply any serums or moisturisers. By misting my skin, I find it better absorbs any serums I use after. Alternatively, I treat my skin to a pick-me-up spray after lunch, which helps a great deal if my skin has begun to look a little tired and dull from the dehydrating office air.
Tip: If your facial mist of choice is just plain thermal spring water, make sure you dab off the excess droplets after a minute as the water will evaporate, drying out your skin in the process. If it has botanicals however, the botanicals will help bind the water to your skin so that the mist can be absorbed.