So many mahjong players struggle with choosing a hand to play during the game. Here is a great way to practice picking your mahjong line so you can be better, faster, and more confident during your next mahjong game. Here’s how: Grab your bag of mahjong tiles, and just leave them in the bag. This is your draw bag—you don’t need to set anything else up, though a rack can be handy for keeping tiles organized while you practice. 1. Draw 13 tiles at random from your bag. This is your practice “deal.