Comment on Google Authorship Tutorial by SEO Dave.
You decide a page is your author page, mine is https://stallion-theme.co.uk/wordpress-seo-theme-developer-david-law-seo-dave/
Link every page of the site you want authorship of to that page using the rel=”author” tag.
Add a link from your author page to your Google+ profile page like you see on the post above.
Link your Google+ profile back to your author page.
So there’s only one link needed per domain to your Google+ profile.
Update: the above is no longer needed.