Most Helpful Girl
When you take a shower, brush it the way you like your hair parted/styled that day. Depending on how thick your hair is, you might have to constantly wet your cowlick so it can weigh down the hair and stay in that shape/position. If it's an extreme change, I've notice it takes a few days+shower for the hair to adjust the roots to my new hairstyle. Another option is to use hairspray.