How to Add Google Authorship Markup in Blogger Posts

Noumaan shared a good information about blog authorship and all the stuff behind it. According to google's Webmaster Central Blog, they are going to add this link relation to Blogger and Youtube content in future automatically. Until then, instead of waiting do this simple tweak and you are on your posts with your google plus profile link as author link.
1. Copy this link to Notepad

<a href="https://plus.google.com/107301882632607014913/about" rel="author">Muhammad Shakir Aziz</a>

2. Replace the name with your name, and link with your G+ profile link.
3. Go to you Layout tab of Blogger.
4. Go to address bar. Replace blogger.g? part of the link with html?. Refresh the page, you are at html edit tab of old Blogger interface.
5. Check Expand Widgets check box.
6. Search for this line <span class='post-timestamp'>
7. Add the hyperlink for author created by you after this line. You can add "Posted by" before the link as well, without quotes.
8. And to make it perfect go to Page Elements tab, click Edit on Post Widget and uncheck "Posted by" check box.
9. You should be able to see you Google+ profile link instead of blogger profile link as your authorship link.
Enjoy until Google adds automatic linking to your G+ profile.