Tenets of Tae Kwon Do

To be successful in completing Sudoku puzzles it's best to develop repeatable strategies for analyzing the possible values for the empty squares. Robin and I would occasionally do them together and she had some strategies that I couldn't grasp, but recently as I've begun to do them again I think I've been developing some of those strategies. Being able to complete them reminds me of her "Tenets of Tae Kwon Do" (she was a Brown Belt):

-Patience
-Perseverance
-Integrity
-Indomitable Spirit