all seo works are best but you should mind for quality links & original content

Few Off page techniques are-
Social bookmarking, Forum posting, QnA, PPT/PDF creation & submission, Video creation & submission, Web 2.0, Micro-blogging, Infographics creation & submission.

Off Page Optimization Is something which is done offsite and usually not visible on the website however results in pushing the ranking higher on search engines, it is a regular process and must be done ethically for better and long term results like:

1. Creation of New Pages
2. Link Building Services
3. Directory Submission
4. Article Creation and Submission
5. Classified Ad Creation and Submission
6 Blog Post Message Creation and Submission
7. Press Release Creation and Submission

Best Off page technique are:

Article Submission
Guest Blogging
Blog Commenting

1.Guest Blog
2.Forum Posting
3.Infographics
4.Article Sharing
5.Press release and Document Sharing