In Go Rummy, jokers are wild cards that can greatly improve a player's set-and run-forming abilities. Knowing how to use jokers well can make all the difference in winngames apking. One popular tactic is to use jokers to complete sets or replace hard-to-get high-point cards. Successful Joker Placement Techniques. When you have two kings but no third king to complete a set, for example, you can utilize a joker to complete that set while maintaining the flexibility of your hand for other possible combinations.