As galio, When no team fights are occurring, split push and draw the enemies attention to you while your team sieges or makes plays on the other side of the map.

Keep a constant eye on the map during the mid-game so you can assist your allies with your Ultimate R when appropriate. 

Try and always stay somewhat near your team so you can use your Ultimate R to help them. One way you can achieve this is by pushing a side lane with your Q and then running towards them while the wave keeps pushing. As galio, When no team fight occurs, push and draw enemy attention to you while your team sits or plays on the other side of the map. Keep a constant eye on the map during the middle of the game so you can help your allies with your Ultimate R if necessary. Try and always stay close to your team so you can use your Ultimate R to help them.