How to use custom domain name in my blog

Purchase a domain name, then access the domain through the domain registrar.
Click "CNAME" and change the name to: "ghs.google.com" through the registrar.
Click "ANAME" and type in your custom blog domain.
Go to "CNAME Records" and enter these four IP addresses into the available slots:
216.239.32.21
216.239.34.21
216.239.36.21
216.239.38.21
Log into Blogger, go to "Settings," "Publishing," "Custom Domain" and type in your custom domain.
Log in to WordPress and access your blog.
Go to "Options" then "Domains."
Do one of the following: register a domain at a domain registrar and then type that domain into the "Add a Domain" field, or type a domain into "Add a Domain" section and register the domain with WordPress. As of November 2010, the former costs $10 per year plus the cost of the domain with the registrar and the latter costs $15 per year.
Make a domain with a registrar and go to "A Record" through the registrar.
Change "A Record" to 72.32.231.8
Sign into Tumblr, click "Customize," "Info," then "Use a custom domain name."
Type in the custom domain and click "Save Changes" for the custom domain to take effect.