Here are a few examples of calls to action:

• I am not ready for people to make comments on my blog.  
• Link to other articles outside your site. I have linked to other things in my blog, I have no need to do this at this time.
• Link to other posts within your blog or site. I do not see the reason to do this to my blog.  If they did not read it, they did not read it.  If they want to read it, they will read everything.
• Share products/services (if relevant).   Maybe I will sell T-shirts someday.