Rough dry with your fingers or a wide tooth comb until your hair is at least 80% dry (color lightens/brightens, feels dry to initial touch). Then go in with a round/styling brush to establish volume and style. This will reduce frizz and breakage because your hair is at its weakest when wet due to a loss in stretch or elasticity.
When using hairspray to hold a style use it before you actually heat or place your style. Hairspray attaches to underlying product first which can weigh down a style if just applied at the end of styling. And you can still go another round at the end for that extra hold.
NEVER rub wet hair with a towel. Lightly squeeze water starting root to end. Rubbing causes friction and friction creates frizz.
When blow-drying, do not touch nozzle to hair directly. The nozzle retains heat and you lose control of how much heat is being directed to the hair. This can cause damage and frizz. Try to keep the nozzle at least 1-2 inches from the hair to keep a consistent temperature throughout your blow-dry.