I have spent a few hours today to figure out a way to add comment boxes in each post today.

So I come up with Disqus.

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Step 1

1. Create a Disqus account.
2. On the top right corner, press the preference button
3. Press Add Disqus To Site.

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Step 2

1. Fill up this form with something.
2. Press Finish registration.

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Step 3

• Press Universal Code.

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Step 4

• Follow the instructions and add the code into whereever it suppose to be at.

1. I copied the code above into /_include/comments.html
2. and added the following line to /_layouts/post.html

Updated: I switched to google+ comment box now.