Whats are some best way to build some backlinks ?

You can also try video submission and presentation submission it build a permanent backlink and also attract traffic towards your site.

by making classifieds,social book marking, Directory Submission, Blog Commenting, forum posting,are some technique for building back links

tumblr and youtube marketing are also very effective ways to get good quality backlinks.

I think you should do blog comments first to get good backlinks, but always remember one thing about blog comments, you should comment on do follow blogs and always comment which is true not fake with that you promote your blog as well can get good backlinks.

lots of off page techniques to do the help of with that you create thousands of back links