connect with your users, see what they like and work on it, create viral posts and share them, create videos about it post them on youtube. do some seo onpage offpage thats it. hard work is the key
there are two types of it, one long tail and other is short tail. long tail includes almost all keywords in a sentence type,short tail contains main exact keyword
do some profile creations on some varies sites, either they are giving do follow or no follow it does not matter,you will get good pa da. then do some social bookmarkings. most of all you must build a unique contents and share your posts to fb,google plus. it should work fine then