Each blog you create has its own unique ID number. Usually, you won't need to worry about this, but occasionally it can be useful to know this number.To find your blog ID in Blogger:
Go to dashboard. Go to Pages,Post or Template ....
The address may look like this:
http://www.blogger.com/blogger.g?blogID=1234567890123456#pages
Create New Page - Look for Web address
Copy the code below
http://www.blogger.com/follow-blog.g?blogID=1234567890123456 replace with your own BLOGGER ID.
Click save and check the FOLLOW ME on top of your page.