Its importent that you get all the minion kills, so lane with a Soraka or Sona to heal you up all the time and then just stack your "W" up at last. Your "E" is a good minion killer and you deal a lot of damege with it so remeber to have it ready most of the time.

I take Infinity Edge early on so my crits deal a lot of damege. I go for Frozen Mallet after so i slow my targets and have easier to kill them! You can buy B.F Sword before Berserke´s Graves so you get a lot of Damege

Every time you have your Passive you should attack the opponent champion.