So finally I figured out that the best thing was to visit the blog of the person leaving the comment and leave a comment on their blog - sometimes replying to what they said or often just making a comment on one of their posts.
The only replies I do on my blog is where the person doesn't have a blog or I can't figure out which blog they come from. I do warn people commenting that this is what I do like this:
I have noticed that some people reply to comments by email. I would be interested in your views on whether this is a better way to do it. I had assumed that people would prefer you to visit their blog and comment - because that increases the page views and exposure to their blog...


