Forum posting
Blog commenting
Article submission
Guest Posting
Business Listing
are latest off page SEO activities.

1.guest posting
2.directory submission
3.social media network

Latest off page is Improve the ranking
Bookmarking
Forum
Blogcomment..etc

Infographics submission
Image submission
Guest posting
Forum submission
Social bookmarking

Directory Submissions is almost band from SEO Off Page Activities .

1) Blogging
2) Community creation in Social networking sites
3) Forum postings
4) Search engine submissions
5) Directory Submissions
6) guest posting
7) video promotion

There is not anything something special seo technique in 2017. but in 2017 you should focus on mobile friendly site, fast load time and schema code.

Guest posting, forum posting, web 2.0 creation is the effective in off page seo techniques.