Pain in the a__?

When we drove the Alaskan Highway, my back protested the long hours in the truck.  I tried pillows and cushions and giving Steve heck, some of which helped, but not enough.  Then I happened on another sort of remedy–Sudoku.  Puzzles do an amazing job of muting discomforts of all kinds, and for some reason, staring at them doesn’t make me carsick. They are somewhat addictive, and I miss miles of scenery, but I see a lot more than I would staying home with a bad back.