Steemit is so new that many popular tags hardly have any content yet. Be one of the first in some of these tags and you will have a chance to build up a good reputation early! Some examples i found are #gifs #babes #erotica #xxx #toplists #celebrities #hollywood #actors #tvshows #television #movies #stand-up #hillary #hillaryclinton #anarchy #compilations #webdesign #programming
Also many popular sub-tags are up for grabs (popular TV shows like #breakingbad, popular movies like #harrypotter and popular games like #counterstrike)
Happy earning folks!