Adsense does not always work
Someone said to me that adsense sometimes sucks until you get a million visitors. Maybe he is right. It is not always true that adsense will be the best ad option for you. Although adsense is not predictable until you start getting few hundred visitors per day. After that you can try out few ad placements and see which works best for you. Adsense works for some niche or rather some blogs, while may not be that good on your blog. So keep trying other ad options too. At one stage, you will reach a perfect blend of ads and then you can go for that till end.
