whats is the appropriate time to begin the link building ?

Some viral sites gets 1000s of links within hours of launching. Google does not necessarily punish you for getting a lot of links fast. They might if they are from poor link neighbourhoods, but other than that - build away as fast as you can.

 

I am agree with you it is very difficult to make 1000 backlinks in a month. and it is not possible without using black hat seo techniques.

 

you forgot "Keyword in the url" that is a very basic factor that google consider.

 

Yes mate keyword in URL is helpful though there are many exceptions like when you search for keyword 'seo forums’,'v7n' comes among the top 2.

 

when you finish all your desired on page work that you should before starting any link building campaign. after c hanging your site architecture to seo friendly if it is not.. after creating some more content that distributes useful information to viewers ..

 

Link Building supports to stay your high ranks in google, So at first make your ranks high in search engine, and start then link building.

 

As soon as you have a website worth linking to, start getting links to it.

 

First of all do onpage optimization for your website after that do link building for this.