The initial promotion of the project

1. add yourself to the Yandex webmaster, the metric in Google Analytics. provide your xml site map
2. Poparcia on the discussion forums, kontaktgruppe, Facebook, tweeters, etc. at the same time and the link weight will increase
3. The context of ultra-cheap at 1-4 cent keys, can cheap banners on thematic resources, through services like rotaban.ru ( www.rotaban.ru/?a=koroho ) ( choose the sites with particles a minimum of 10, wide and large sizes of banners, no more than 50 rubles, and the number of displays is more than 3000, for example, there will be many, trust me.)
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And then, when the audience can drink buttermilk in the glass and Smoking sausages in the Canary Islands and remember me

I think that the answers to the following questions can clarify the picture.
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From the user's point of view, what is the functionality of the project is to register and spend on this website. Why is this website better than others? While it is a new and unknown place, to take care of, spend time, and it is unknown if there will be some benefit.
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In your website/project is able to generate curiosity from experienced users? What his "trick" of which the users themselves want to tell each other?
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Word of mouth is much more effective than contextual advertising in Google.

Write about it interesting article on a popular resource. For example, on habré.

Asked the same question. So far only agreed with some of the regional news website about the announcement of the service.

And what better to start the promotion immediately after starting or before starting collecting addresses? And better to do open enrollment or closed?

Support the question. He recently launched a startup, and how to promote I don't know...

Point by point:
Through friends
Through forums where You have a "weight",
— Through blogs in which You have a "weight",
— Using SOC.network.