How to take your throw to the next level.
No matter what style of throw you use, always remember that it should be a consistent and comfortable throwing motion. The more consistent your mechanics the better you will throw. Experiment with different throwing motions to develop your style and then pick one style and practice until the motion becomes second nature. Your throw is one of the most important elements of the dart game. Take some time to analyze your throw and develop some good habits.

Advanced throwing techniques should incorporate the following:

Minimize movement. Only the shooting arm moves. Your shoulder should stay completely still, as should the rest of your body. You’ll make the game easier by keeping as still as possible while throwing. A steady and controlled back swing is critical to accuracy. Very few people can throw accurately without a back swing. And one smooth and fluid motion to the board is critical. Try to minimize any side-to-side motion.

Consistent release. This is very difficult to monitor, however a reliable release point for your dart throw is crucial to achieving consistency. Some players release the dart early in the throw, when the arm has just begun the forward motion. Others wait longer and release the dart at the very end of the throwing motion. Find out what is most comfortable for you and practice consistency with the release point.

Snapping the wrist. Not all players snap their wrist at the end of the throw because it is one more thing that can go wrong in the throw. However, it does help with acceleration in the last phase of your throw. A slower, controlled throw can increase accuracy and snapping your wrist like a whip can provide sufficient speed at the end of the throw.

Follow-through. A follow-through is critical. When a great basketball player takes a shot his hand follows through the motion of shooting the ball. Darts requires the same motion. At the end of your throw your fingers should be pointing at your target or down towards the floor. If you are pointing up to the sky then you probably aren't following through properly.