Accuracy is defined as the ability to control movement in a given direction or at a given intensity.  The importance of accuracy is evident in many sports, whether is be throwing a ball, hitting a ball, or delivering a strike (martial arts). Accuracy is one of several components of fitness, and differs from coordination in that athletic coordination is the ability to combine several distinct movement patterns into a singular distinct movement.
There are a myriad of methods employed to increase accuracy, however, the most common method is practice. Practice should be the foundation with which accuracy is built upon, while any alternative method should be used in conjunction with practice.
Integration of mental rehearsal into physical rehearsal has been shown to improve throwing accuracy more than with physical rehearsal alone.
Behavior-modeling training has been shown to increase free-throw accuracy in intercollegiate basketball players.
The use of caffeine has been shown to increas hitting accuracy, speed and agility, and overall playing success on the court in tennis players.