My motto for dance and gymnastics:
"Don't take the sport you play for granted. Every time you play, you better be thankful that you get to do something you love. Don't show up to practice complaining about not wanting to be there; you're there hopefully because you love it. Work hard every moment. If you're not working hard, you don't deserve to play. Play every practice or game like it's your last because it very well could be. When you finally reach the day that you can't play, and you can only watch, then you will know how much you love something that you once took for granted."