To add “Add This” widget is very easy, just concentrate and follow the following steps.
1. Go to Blogger > Design > Edit HTML.
2. Check the Expand Widget Templates.
3. Press Ctrl+F and Search for
4. Copy the below code and paste it after
5. Now here is what you can do, if you want to show the add this widget under your title then paste the code above
6. Now Save template, and refresh the page to see the change in the post.
I hope that this tutorial will helped you alot in adding "AddThis Social Bookmarking Buttons" to your blogger blogspot blog. To learn more about Blogger that How to Add Facebook Like Button, and How to Add Facebook Like Box follow the links.