1. Buy your domain name at 1and1.com. This usually takes 48 hours. Some may take a while but be patient. Once it’s ready, go to your 1and1 Control Panel and log in.
2. Select by going to Administration tab.
3. Click Domains, then the domain overview page appears.
4. Enter only the subdomain you want to use. Click OK.
Example: If you chose www.mydomain.com for your blog’s address, you should enter www only.

5. Under DNS menu, select Edit DNS Settings.
6. Click on CNAME.
7. Enter ghs.google.com next to Alias.
8. Click OK.
9. Go to your BLOGGER account. Click Settings ->Publishing ->Switch to CUSTOM DOMAIN and enter http://yourdomain.com.
10. Go back to your 1and1 control panel. Put a check mark on your domain.com.
11. Click Destination ->Edit Destination ->Click Forward Your Domain.
12. Choose HTTP REDIRECT. Click OK

Godaddy:

> Go to Godaddy.com
> Manage My Domains

Under Add New ARecord, there is @ and IP address. You have to delete it. But before that, make sure you copy the IP address just in case you need it again. That IP address belongs to Godaddy.com park page. So when you click http://yourdomain.com, it will go to godaddy.com park page.


So inorder for your domain name to work, here’s what you should do:
1. Click on Total DNS Control and MX Records
2. Under CNAMES, add new CNAMES records
3. Then enter the following:
Host: www
Points To: ghs.google.com

Blogger:
Go to your Blogger account > Settings > Publishing. In the text field, enter www.yourdomain.com

Allow 24-48 hours to take effect. Hope this helps!