Share 'If you could change ONE aspect of your game for the better (within bounds of reason) what would it be?'

I will start.......I wish I could consistently use my serve as a weapon  (not necessarily aces galore, but at least setting up winning shots) and not just a method of getting the ball into play..... I struggle mentally with the idea that you are better off getting in your FIRST serve, even at 3/4 speed, than to let your opponent  have the chance to possibly tee off on your second serve. I have a…