1. 147, 258 Rule: If the player after you discards 1 Wan, it's generally safe to not take 3, 4, or 7 Wan, but you might consider taking 2 or 5 Wan.
2. When the game is halfway through and the player before you starts discarding wind tiles, avoid calling them unless doing so will give you a winning hand.
3. If the game progresses without you winning any hands, it’s best not to rearrange your tiles and instead play familiar tiles. Rearranging increases the risk of drawing into a big hand.
4. If the player after you discards 3 or 8 Wan, they may have 3, 5, 6, or 8 Wan in their hand. Be cautious when playing 4 or 7 Wan.
5. If the player after you discards 8 or 9 Wan, they may still hold 4 or 7 Wan. Exercise caution when playing 4 or 7 Wan.