- Open the Settings tab for your blog in blogger
- In the Basic sub-tab make sure Show Email Post links? is put to Yes
- Open the Layout tab
- Select Edit HTML
- Click the box for Expand Widget Templates
- Search for quickedit pencil in the code.
- Below that comment and the line after it are where you will add the buttons
The hardest one for me to get working was for facebook, and this site got me most of the way there. I had to change and update a few things, and I still think there is probably a better way.