The story of most of the People!!
This post will be beneficial for all bloggers who earn through adsense or want to earn $$$ through it. Most of the beginners do is.
1) Create a blogger. Copy some content and apply for adsense straightaway.
Rejected!!
2) If he knows about Domains, will buy a Domain name[any one which he likes] and get started and after some Traffic hits he will apply for Adsense.
Rejected!!
Or even if you are accepted in the above circumstances, you will not make Good $$$ and will get frustrated, then you will
1) Start clicking your own Ads.
2) Ask your friends to click it.
3) Then Come in the forum and ask for Click Exchanges.

And you wil get kicked from Adsense.
You will abuse Google, Adsense Blah Blah.
Reason you are kicked : The Advertisers pay money to get conversions. Your Junk and Useless clicks will make them loose their money. Hence Google will give a kick on your Ass.

The mistakes by most of you (including PROs)
1) You do not know anything about Keyword Research.
2) You select Random Crap Domains.
3) You copy articles, don't know about Uniqne content.
4) You try to reach the Limit of 100$ which is the Payout limit per month and if you don't reach the limit, in the process may click some Ads of your own [thinking google would never find out as There are billions of Users of Google]
5) And Lastly You are not sure How to Earn $$$ with Adsense.

Last but not the least you go to a "Adsense Guru" who Tells you:
1) Put some Unique content on your site.
2) Do some Keyword Research.
3) Wait for Visitors to come and click on the Ads.
The most Famous sentence of their’s And see the $$$ Flowing

But you do not understand anything and Leave it.
Most of the topics and discussions Related to Adsense doesn’t benefit you a lot.
Everything comes from Experience.

I bet 99% of the People wouldn’t know this completely!! 

 Let's get Started.

Keyword Research means selecting the right keyword for the Domain.

Say we take "Dating" Niche (same as in another Thread)

1) https://adwords.google.com/select/KeywordToolExternal

2) http://www.name.com/names

3) http://www.google.com

We will use the Above 3 Links.

First Link: You have to find the Keyword for which there is less competition say 1000 to 7000 searches per month is Ok.

Select Exact searches and Show all columns.

See the CPC as in

As you can see 8.46$ for a Single click

You may get little less and little more.

So Adsense is basically a simple Stat.

For 100$ a day you need 100/8.4 = 11.82 = 12 clicks per day.

And CTR of 3.75 is considered The perfect  

 So 12 clicks : 3.75
?? : 100

1200/3.75= 320

So you need 320 targetted visitors a Day on your site with the Keyword "Dating Services" to get 100$ a Day.

If you put Unique content[written by you] with Keyword in the title and in the first Paragraph with a density of 2-5%.

You need to Rank High in Google for that keyword and for that we are going to use a good domain name.

You can copy the Keywords and use the name.com Multiple Domain checker.

Select the exact keyword in either com, net, org or info.

Say like DatingServices.com

The guy in the other thread just simply told you that it will get you 1$ per click and you will earn $$$.

Ask yourself you will earn with this or that?

Want 8.46$ per click or any single amount is Ok?
Conclusion:
You need to invest a lot of time in Keyword Research.
Find the keyword be sure to register the domain name within 4 Tlds.

4$ CPC
1,000-6,000 Exact Global Searches per month is a good example.