there's is a product called market samurai, I use it to find really good keywords and it works pretty good for me. You can also use free tools as well but hey, whichever one works the best for you!
Just keep at it and write a lot of good quality blog posts with your Wordpress site. Eventually you will get noticed and start to earn money.
What i did is social bookmarking submission, rss submission, article submission and directory submission. I also keyword research before submitting to those i've mention. This is not an overnight thing. You will put a lot of time if you want to earn more. Patience and determination is the main key. Enjoy!
all depends on traffic and how you place your ads.. first off worry about building traffic by building good backlinks and doing seo the rest will follow..
Do research Google high paying adsense keywords then upload the content related the niche you will get good rate click through some time I got $10 some time less no fixed income although I'm not getting time for my adsense blog to do promote if you can invest time properly you can earn good $$$
i made $34 last month but has over 10k hits some days and made nothing, most of my adsense revenue comes from posting on other sites that share their revenue, my site just does not seem to make any money
There are only 2 things which you should take seriously to make money with adsense and it is Content & Traffic get them and make big money from adsense..
Honestly, provide excellent content in a long tail niche. Rinse and repeat. It doesn't have to be mind-blowingly academic, but the writing needs to be engaging and technically flawless. Slow and consistent backlink building + regular updates = a great pagerank, and the revenue will come.
Sorry, the experts are tired of saying the same things over and over again to people who are too lazy to use the search feature.