Help with web site Promotion

It is hard to admit when you don't know something, but i figure I have nothing to lose and everything to gain. So here I go.

If you have read my previous posts you would know that I have a website The Ideas Library,

If you ask me, I think the site is awesome and I think it is something that the Internet world would love to use.

But how do I get people to use my site?

I ran an ad campaign through facebook for a month and while I did get people viewing the site, I could not get anybody to sign up or post any ideas, which is the whole premise of the site.

Am I way of the mark here of what people want?

I have also been using Twitter to get the word out about The Ideas Library, howeverI am still getting the same result.

Could anybody give me some advice on how to get people to start using my site? or maybe some services I should be using to help promote it.

I should mention that I currently do not want to start spending money on advertising because The Ideas Library is still in it Beta phase.

Thanks for your help.

Terrence D Kuiper