I do most things right-handed, but operate a hand drill and knife & fork left handed. I can play squash left or right handed, but my left handed game is less powerful. If necessary, I can do most things in the workshop left handed, but can't write left-handed to save my life.
When I was at school, the kid next to me burned his right hand badly. He simply swapped to writing left-handed until it was OK again. His LH writing was much neater than his RH.