1. You must have a gmail account first, if you don't have just go to mail.google.com and signup. Then comeback here.
2. After signup for gmail you must have website (or) blog to place the ads. If you have a website just go to the next step. If you don't have money to make a website, just make a blog from Blogger.com its free. Its quiet nice, easy to customize and edit. Just go to Blogger.com and use your Gmail account to sign up, like me. You must make your blog as interesting as possible to make many peoples visit your blog. And you must make them visit your ads. It's pretty though, but if you keep updating your blog with high quality content it's pretty nice. You can store your blog with your diaries (or) experience, even a magic trick!! If you done with the Gmail account and the blog, then we will go to the final step. Ready for it?
3. Go to www.google.com/adsense or type "adsense" in google search engine, then follow the instruction. Fill the field with your real identity, or if you are under 18 you can make it with your parents identity. Of course with their permission!! If you done with your adsense, then start promoting your blog (or) website to your friends, your relative, your family, your parents/children friends, even a STRANGERS. OK, have a nice blog and a nice money from Adsense. I hope your succeed can be my succeed too.