HOW TO: Become a Google+ Beta Tester

Want to test new Google+ features before they become available to the public? Now you can, thanks to a newly launched Google+ program. To sign up to be a beta tester, head over to the Google+ Platform Preview page and enter your email address. Any address will work, so long as you’re signed in to your associated Google+ account.
You’ll need to click on a link in a subsequent confirmation email to confirm your entry into the program. After that, Google will email you every time new features are available for you to test out.
If you’re looking for additional Google+ resources, be sure to check out our roundup of 15 guides and services for Google+ power users.