if you have a decent social networks like twitter and friendster with many followers or friend then you need to earn points in viralcontent buzz to get traffic.
My experience with Paid Traffic - About 50$/monthly for as they said " 3000 unique visitors" Example - Because i did not had the time to surf other websites i paid for this services. Conclusion: Google Analytics was telling me that from 3000 visitors/monthly i got only 200 from that site. Alexa was the only one who showed that i had heavy traffic. But if you don't pay for 1 month the Alexa rank will go down too. Don't waist your time with this.
make some group or litout some public group in facebook which have largest member and allow public post then start publish your content on this groups. it is good if you make and build your own group.