Google Adsense Secrets Revealed - Pats 4 Topic Selection?

Next you need to learn how the experts select topics for their Google AdSense sites. Choosing the right topics (keywords) is the difference between successand failure!
Let’s take a look at the various tools that you will use, and how you will use them. First, you need keyword research tools. You can find out what the top keywords that are being searched for are with a web based tools such as Word Tracker, at . There is a fee for using this tool, but you can sign up for a free trial. But finding
the most frequently searched for keywords isn’t enough. Once you have a good list of what people are searching for the most, the next step is to find out how profitable those keywords are. 
Not all frequently searched for keywords are profitable, and if you hope to make a full time living with Google AdSense, you need high paying keywords. 
Not all frequently searched for keywords are profitable, and if you hope to make a full time living with Google AdSense, you need high paying keywords. Now, before you rush out in search of a list of high paying keywords, note that even if there was such a list, it would constantly be changing, just as the list of frequently searched for keywords changes.
Furthermore, you don’t seriously believe that other AdSense publishers are going to share such a list, if one even existed, do you? They wouldn’t. You have to find this information yourself. Here is where having a Google AdWords account will come in handy. You can see what the advertisers are paying to get in the top position of the search results for their keywords. Simply log in to your free Google AdWords account, and click on ‘tools.’ Next, click on Keyword Tool.
...or in case you don’t have an Adword account, just go to: 
Enter your keywords, and then in the drop down box below that, select ‘Cost and Ad Position Estimates.’ Type 5.00 in the last box, and hit ‘calculate.’ Now, Google will display possible keywords, based on the main keyword that you entered. Next to each keyword, you will see the estimated average CPC (cost per click) and the estimated position. 
You want to view the CPC for the keywords that will fall into the top five on position, stated as 1 – 3 or 1 – 5. As of this writing, using the keyword phrase ‘weight loss’ you would see that the estimated CPC for ‘best weight loss program’ is 2.54. Now, as an advertiser, that is what you would pay per click for an ad that is being run on position 1 – 3 when that keyword phrase is searched for. As a publisher, however, you would not make 2.54 per click. Google wants their share as well. Google doesn’t state what percentage is earned by the publisher, however. It varies, and how that percentage is figured is Google’s secret, and they are not sharing that information! 
You basically have to pull a percentage out of the air to work with. Try using 30% as a guide.Once you start getting clicks, you can then look to see what the estimated CPC is in AdWords, and then see how much you were paid for that click in AdSense to find out how much Google is paying you per click for that keyword. Again, this varies from one keyword to the next, so there are no set guidelines here.Keep in mind that it’s maximum bid that’s displayed, meaning that’s what the advertiser would have to pay per click on an ad being shown on positions 1 to 3 in the sponsored search results. 
Now imagine if you have lots of ad blocks on your page -- that will enable the cheaper ads to be displayed as well. You will discover that most of the time you’ll end up getting clicks on those, thereby making only a few cents... 
“My suggestion: Less Ad Blocks! - This Will Get You More Revenue Per Click!”