Be active in the community, review other peoples stuff, make good use of your newspost, put your music EVERYWHERE (NG, Youtube, Soundcloud, Tumblr, Twitter, Facebook, etc. etc. etc.).
Of course.. making good music helps too.
There is one big thing I must note though... you shouldn't expect to have a ton of fans right away. Speaking strictly from a NG standpoint, you are fairly new on the scene, and unfortunately, there are thousands of other people competing with you for fans, you just need to put yourself out there.
Whenever an opportunity to take part in a contest arises... take it. Whenever an animator is looking for music for their game, put your music in their view, if they use it for a game that could be fairly popular, you will absorb some of the through traffic as fans.
Post music regularly, chat with your fans regularly, be interactive in general.
If you play any online games, mention that you make music to your guild/dungeon buddies/other people... once in a while you'll get lucky and someone you show your music too may run an online radio station, or (As I've had happen) runs a gaming channel with 30,000 subscribers, and mentions your music to their fan base.
It's really just about putting yourself out there.
But again, I can't stress enough... it isn't something you should be expecting to happen overnight... or even over a week... or month... or a year or two... It takes time, unless you get extremely fortunate and find someone or something that essentially snowballs the exposure you receive.