CLEAR THE GODDAMN WAVE!!

I absolutely hate seeing the enemy team push a tower while my ally is just there pacing back and forth trying to poke.

If there are two people pushing your tower early/mid game and you're playing a champion that is able to clear the wave(from a safe distance), PLEASE do so. I don't think the average player knows that minions greatly reduce a tower's defense once they get close enough. Simple knowledge like this has a huge impact on the outcome of games.