What are the best off page SEO Factors?

Search Engine Optimization field is booming day to day with new inventions and innovations. Here is the list pf off page SEO factors. Have a look:
1). Community Creation in Social Networking Sites.
2). Blogging.
3). Forum Postings.
4). Search Engine Submission.
5). Directory Submission.
6). Social Bookmarking.
7). Link Exchange.
8). Cross-Linking.
9). Photo Sharing.
11). Business Reviews.
13). Article Submission.
14). Press Release Promotion.
Above those stages are most popular in SEO.

Search algorithms and ranking factors are constantly changing. the major SEO offpage factors need to consider before getting backlinks from the website are relevance, trustworthiness, and authority.