create one blogs or site that have a good content... take it to become a member of Google Adsense and then make more and more traffic and make money with adsense. see my site under as an example for blogspot with adsense.
your question is pretty vague. not sure you have an account already or need to get one, or you have an account but dont know where to go form there. if you already have a site or blog, start by applying for an adsense account. if you already have an account, then ask specific question to get helpful answer
Go to the google site and fill out the forms with your info https://www.google.com/adsense/g-ap...id=aso&subid=ww-en-et-ads-0-adsC-all&hl=en_us then wait till they accept you and follow their instructions, read all the rules etc and you are on your way
have a domain create your website put in some contents apply for google adsense account put the adsense code to your website wait for the cash flow...