Keep your max bid and your daily max low, real low, and then experiment with doing higher bids on certain keywords/phrases and increase your daily max as you see fit.
Just remember whatever you're promoting, there's a whole lot of people out there doing the exact same thing, for longer.
Don't go nuts right off the bat or you'll lose your shirt.
It's better to keep you cpc as low as possible until you discover an angle. That's when you make your move.
