The +1 button now allows you to share with your Google Circles, directly from the page you are on. Google says that “beginning today, we’re making it easy for Google+ users to share webpages with their circles, directly from the +1 button. Just +1 a page as usual and look for the new ‘Share on Google+’ option. From there you can comment, choose a circle and share”.
For more on the new +1 button, sharing on Google+ and +snippets (where they automatically include a link when you share), watch this video.