I see so much talk of cpc. I don't really even think about cpc. I handle cpc's of $0. 15-$75 and I don't really think about. It's not the determining factor, whether I bid or not. It reminds me of holding your last poker chip in your hand and considering whether or not you'll throw it in the pot. I find, that conversions are a result of multiple source interactions, organic, paid, social, direct, email, etc. I often see a $0. 75 click that leads to a $5 click and a few social interactions with a direct visit, resulting in a longterm client or buyer that will continue to convert without spending your ad dollars. Not to say I have the answers here, I learn new things every day. I mostly deal with ecom. I'm sure it's a bigger challenge for others in competitive lead capture and the like. But, I could write pages on this topic and why advertisers should not fixate on it so much, but I'll leave it there.