Instructions
Say "Jinx" when you and the person you're speaking to say the same word or phrase simultaneously. Say "Jinx" before the other person can say it.
Incorporate tie-breakers if you both say "Jinx" at the same time. Standard rules for Jinx have tie-breaking words in this order: "Double Jinx," "Triple Jinx," "Personal Jinx," "Personal Jinx Black Magic Jinx," "Your Mother Jinx" and "Mantii Jinx."
Instruct your jinxed friend that she can't speak until a certain event of your choosing happens. Popular conditions include the Jinxee buying the Jinxer a soda or waiting until someone else says the Jinxee's name.
Enforce a penalty if the person speaks before the Jinx has been lifted. The most popular penalty is a punch in the arm from the Jinxer. You can also have the person buy a soda as a penalty or pay a nominal fee (such as a dollar).