A little tip I've learned

about commenting in a blog post is the rule of three. Basically if you are commenting on another's blog you have 3 posts to make your point. This is helpful for a number of reasons:

1. If it takes more than three, get your own blog or take the conversation to a forum.
2. You are there to (in a sense) enhance the original post. Even when disagreeing your comment is in connection to the blog post. OT comments are next to useless.
3. You are a guest on the blog in question. Multiple comments disrespect the author's contribution. It's his blog, not yours.
4. It lets you walk away from a conversation. For some reason blog comments are notorious for sucking people in. This way you force yourself away.
5. Unless the point is unusually important usually a commenter doesn't contribute past three comments.
6. Allows the author of the post the last word.

I find it disappointing to see a blog post with "200 comments" only to find the same three people hashing out their personal issues with each other (usually in the form of screaming).

Three posts. Give it a crack.