Flip your head upside down, then spritz a light hold hairspray onto roots.
Hold the can about six inches away from your roots so the mist goes on evenly.
Wait 30 seconds for the hairspray to dry before flipping your head back up-this will lock your roots into an upright position and perk them up pronto.
Finish up by gently brushing hair into place making sure to not press down too hard or you risk crushing your newfound volume.
How easy is that?