The rules:

1. Don't try to win lane,your purpose is to win mid-late game.Play safe as possible,even if you need to farm with max range Q.
2. Farm as much as possible (for level more then for gold),if you get level 16 your ultimate is insane
3. Spam Q in fight,but not in lane! Try to keep at least 150 mana in case of fighting or needing to ult. Try farming with basics or with single targer q's.If you have full mana,shove wave of minions and poke laner as much as possible.
4. Look at other lanes! You won't be able to kill your laner with R,but you can kill other lanes.Try getting kills early,click on the enemies to see HP and KNOW if you can kill them,consider heals or barriers too!
5. Don't R to get enemies low for your team! If you dont kill with your R you will have a BIG cooldown and by securing kills you make sure you will oneshot later.
6. Don't be afraid of dying,if you know you will die go in the enemies as deep as possible,use w and spam q and you will secure kills.In teamfights go in deep and eveb if you die you will do insane damage overall.