On YOLO:

Grammar Lesson: YOLO is incorrect.  ”You only live once” means “The only thing you get to do once is live.” It should read “You live only once” or “You live once only.” Please say YLOO instead, or else the grammar ninjas will hunt you down.  (I’m not actually serious.  But grammatically speaking, this is true. Be careful about where you put “only.” “There can be only one!” is correct, but YOLO is not.)

Better yet, let's stick with carpe diem :)