I have been rigorously doing some online advertising (mostly PPC) to promote various landing pages for the past few months. It was definitely a costly experiment with some modes of advertising returning many fold where as some PPC advertising channels just hogged my budget without returning even a cent.
This short article is about the advertising methodologies and channels that I used and the effectiveness of the same. Needless to say, Google AdWords is still the best option in terms of RoI though it can be really expensive if not careful. Facebook ads, as I mentioned sometime ago, can be cheap or expensive based on your delivery model but ineffective for conversion either way.