If you don't have time to shower and you need a quick hair pick-me-up, here is a great recipe I use. The sea salt adds texture and volume while leaving a matte finish..which is good when your hair is oily. (Tip: Don't use it daily as it can be drying to your hair.)
Picture: Free People Lookbook
Sea Salt Hair Mist:
8 oz. warm water
1/4 tsp. sea salt
1 tsp. conditioner
Fill a spray bottle with the above ingredients and shake well until the conditioner and salt is completely dissolved. Spray onto dry hair until dampened throughout. Scrunch hair. Voila...beachy hair.