How To Resign
The traditional way to resign is to put two stones of one's own colour on the Goban.
The AGA tournament rules require that the player who wants to resign says so with a clear voice: "I resign." Japanese expressions are "makemashita" and "arimasen".
In BadHabits, we have already mentioned that you should not wait to resign until the game is about to end. But one should not resign too early either. When suffering a big loss, it is wise not to resign immediately. Continue for several moves until your anger or disappointment has cooled down, and you are able to make a positional judgment. Only if this judgment shows that the game is really lost, then resigning is appropriate.
Apparently, professional players apply the latter issue with utmost sincerity. We should not be so hard on each other as demanding our opponent to master the professional's art of resigning.