Adding Table of Contents (Suggest me if you have a better method)
Step 1: Add the 'Table of Contents' from here,
This is how it will look like in your Editor
The final version will look like below which is your table of contents. You can click a particular link to navigate to that section in this page.
Step 2: Go to <HTML> option and change a word to heading as shown below. This is will populate your table of contents when you Publish / Create / Save your blog or review.