"hey....
here are Some of the best SEO strategies of On Page & Off Page Optimizations are
1 Unique Quality content
2 Keyword
3 Title, Description
4 Site Map
5 robots.txt & Directory submission
6 Social bookmarking
7 Forum posting
8 Article submission
9 Blog commenting
10 Video submission
11 Question Answers"

I find link building very effective and the most useful. This methods gives the best results.Forum posting is also very useful one,..

Forum posting is a SEO technique which is used on very primary basis. It is used to get the high PR and get the traffic. The back links from high PR forum related to your topic gives you recognition on search engine by increasing the traffic and extending the PR of your site too for which you are doing this process.