Now a days the most valuable off page activity is Content Submission that is article submission, press release submission, blog posting, web 2.0, guest posting n all.

Regards,

SEO Expert Suresh

Link from the same business website or page with high domain authority and good PR.

Submission of link to articles, press release, social sookmarking sites is also considered as valuable off page activities in SEO.

Article submission and blog posting with verified Google+ author is best Off page activities in SEO.

Article submission and Blog Commenting....

Best way,

SMO & Video optimization, photo sharing, Blog Commends