Pst! Wanna know some Adsense secrets? The only secret is that there are no secrets!
Do a search for Adsense secrets and you will be bombarded by a myriad of ads by telling you that they, and they alone have all answers to making lots of money with Adsense. And I say bully to all of them. I repeat: nobody has all answers and there are no "Adsense secrets" per se!
The only thing you need to find out all there is to know about Adsense is a search engine and a bit of common sense. There are literally hundreds of forums where you can pick up all information you need, as well as hundreds of articles that have been written on subject of Adsense.
All answers are out there for you to find it you will put in a little bit of work. If you buy any of ebooks available out there, you might find one little nugget of information that you may not have seen anywhere else, but I promise you: everything is out here on Internet - all you have to do is search for it. Here are some of search terms that I personally have used with great results:
increase adsense income increase your adsense income adsense experiments adsense adsense tricks adsense tips
What I can tell you from my own experience is this:
1. Ads at top of page and on left of page perfom better than any other ads. (Take a look at "heatmap" from Google link below) 2. Ads without background colour and borders perfom better than ads within borders with background colour. 3. Ads within content pages perform better than any other ads. 4. A search box on every page gives you another chance for earning Adsense income. 5. Your link at top of ad should be blue like a normal link, ad should be black, and url should also be black so that it blends in with ad copy. That makes link stand out and gives you a better chance of someone clicking on it.