Apply a top coat and let it dry

If you want to, you can apply a fast setting top coat (available in beauty stores) and make sure it sets really soon. If you dont have a top coat, dip your fingers in ice cold water. This sets the nails polish and gives it a nice shine. Hold the brush between your thumb pad and against the side of your index finger (try adding the finger next to it a little as well for extra support). The idea is to steady your hand whilst keeping your thumb and index fingers free to manipulate the brush you are holding.