Do SEO on your site...buy some backlink service for increase your traffic...post some thead on biggest forum in the wolrd...this is can do by your self
Do you feel some $$$ in your paypal.
If yes, then flock towards microworkers.com and get yourself members.
gimme your url ill tell some freinds about if that helps
This is a really common question. And the answer is always the same.
Forums start and die daily. The amount of forums trying to attract members of the same niche is staggering.
All with a slightly different approach but ultimately all the same.
All trying the same SEO approaches etc.
The top 10 factors i do see that matter are this.
1 niche
2 content
3 seo
4 good site owner
5 promotion. <- not buying hits etc. Legit promotion. Targeting people who might want to view your site.
6 content
7 content
8 content
9 content
And finally.
10 Content.
Content + Monthly giveaways = trafic + win