Promoting via news sites

I made website that could be unique, i’m not quite sure.
But, I think that most effective way of promoting is via portals and news sites when they write nice article about your site and visitors see it.

How to start and where.
Which news site to ask to do that?
Will they do that?
Do I have to pay them to write article about site?
What to say to them?

For new site a suggest you star by submitting a Press Release and even rotate it on traffic exchanges for exposure!

Yes, I agree. Submit press releases to all of the free press release services that you can find. These are usually end up being good back links for you too because SEs love press release sites for their continuously updating content.