Nothing is work unless you'd rather be doing something else.
Don't do anything in practice that you wouldn't do in the game.
Many people flounder about in life because they do not have a purpose, an objective toward which to work.
Nobody whoever gave their best ever regretted it.
You might reduce Lombardi's coaching philosophy to a single sentence: In any game, you do the things you do best and you do them over and over and over.
Find out what the other team wants to do. Then take it away from them.