Erm... PPC? Not sure that I understand the question. Are you looking for specific advice about Adwords, or general marketing advice? Either way, a little more information would be useful...
Just keep going through this forum people list lots of ideas. I just gave this link to someone else who asked the same question, I found it yesterday while I was browsing: http://mixedmarketarts.com/2007/11/08/advertise/
You can increase traffic by using Social bookmarking - Digg, Stumbleupon etc PPC Forums Blogs Articles
Stumbleupon, Digg, buy links, buy ads, adwords, tell friends/family depending on where you buy the links from, your traffic can increase dramitically