Try Taekwondo to practice discipline and self-control. Taekwondo is the world's most popular martial art. This probably owes much to its addition to the Olympics in 1988. Many consider Taekwondo to be an artistic form and as such you must have great self control. You must discipline yourself to make every movement fluid, graceful, and deliberate. Because so much emphasis is placed on movement and form, many find Taekwondo to be a great way of teaching discipline and self-control (to children or anyone).