In SEO, there are many ways of off page technique. Here are some strategies that can help you out:
1. Bookmarking
2. Article Submission
3. Directory Submission
4. Blog Submission
6. RSS Submission
7. Classified Posting
8. Press Release
9. Forum Posting
10. Answer Site Posting
11. Social Media Marketing
12.Guest blogging
13.link diversification
14.info graphic submission