When do i have to start a linkbuilding campaign?

Is it ok to start my linkbuilding campaing ? my website is brand new and i want no mistakes... so....

i need visitors that convert, so... is it good to start? and if i start... have to start aggresive? or slowly? 

did exists red lights on this get-visitors-method? do i have to be careful? in what? 

if i have to appear on news sites (related to my bussines) do i have to write differents theme for every post? or do i have to write same text in everyone?

tnx! 

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