I have read lot of threads in this forum, that was more useful to me. I would like to share a method I used to generate some income from adsense. This method made me random $3-$5 a day.
First I have made some keyword analysis in google tool. I put some keywords that got only 20000 search counts. Then I pasted in note pad.
I searched relevant article for the keywords I selected. I picked from article sites like ezine, associated content.
I made little changes in the sentence formation, I changed it as fresh content. I posted all articles ( around 25 articles ) I copy the link location of the every blog post. Save it separately.
I created a new gmail account. I head over to google groups, I put the keywords one by one and search any group relating to the keyword.
in the result page, lot of posts will come with the google group address.
I copied all the group address. I saved 200 groups. Then I started a group and posted all the same blog posts one by one, but every end of the blog, I would paste the blog link(that is the copy link location)
I will send this message to all the group address at one slot. Then I went to my email and setup an auto responder that is pointing to my blog.
as soon as you posted the message to groupaddress, they start sending messages to you. So your autoresponder will be taking care rest of the work.
I did the same thing for 2-5 days, my blog got so much impression and too many clicks. now I could randomly make $2-$5.
No investment only effort. Try it.