I wish I knew! I've been testing out different strategies. I have a free game with an IAP (http://apple.co/downwordly) and it does okay from an install perspective, but not great for purchases. I was lucky to get it on Apple's radar to drive most the traffic.

This is my first time just doing a paid game. Definitely learning as I go. My plan for the first week is to send out download codes to people who might have an audience to put it in front of. I'll let you know how it goes!