Be patient, don't W the minion wave unless you have to, freezing is your best friend. Also chickens. steal the chickens. Actually just steal everything it's fine. It's fine. The jungler wont mind. Stresses
But the chickens specifically are actually a good idea, the enemy ones especially. Wave manipulation is downplayed in the mid lane for some reason but if your opponent ever backs at a bad time, shove the wave in so it will bounce back to you, and go and take the enemys chickens. Little optimizations like that will boost your AP quite considerably over the course of a long game.
Don't forget that game times are typically shorter than they used to be, which will impact your AP quite a bit.