it dosnt happen in a day or in a month.. you need to put in months of hardwork.. you need to work for atleat 6 months to reap benefits..
Basic principals, Get good deep backlinks, experiment with SEO tools and enjoy what you do at the same time as spreading the word!
hi, it takes time to develop adsense so dont be depressed about it, the key is drive traffic to your site & after the visitors you recieve if you still dont recieve an earnings then look at the ad placement too.