I am a bit of a Sudoku practitioner. For ages I had puzzle books full of them, and in this digital age I have an app on my phone.
When my mind is all over the place, I can open a game and focus. Make sure all nine numbers are in each boxes and each row and each column.
Some puzzles seem obvious, even the really difficult ones. Others I have to stare at for quite a while, figuring out where I can start and how it all comes together.
I usually stick to the hard puzzles, but when I am feeling overwhelmed, I will flip back to the early ones.
There's a single solution for each puzzle, and things fall into place. Unless I get it all tangled up--I can hit a button and restart the game.
Oh, if life were so simple.