You just need:
- Gmail
- Google Buzz
- Coffee
Now go to http://www.google.com/profiles
Lets start here:
- Click on Create My Profile
- Just fill up all of required information, also very important is Links.
- Here in the links section place the links of those you want backlinks
- Now save it.
- All is done, you got backlink of PR-10 google.
Image Proof: