How to handle 40 sites link building campaign

Hi Friends,

I have query for link building campaign of 40 sites and it all are of same category so please suggest me how I can handle 40 sites link building campaign at the same time.

Thanks in advance,

 

Link the sites to each other in a natural fashion...

Spend a lot of time submitting to directories, and submitting articles for each and every site...

Do one at a time?

 

That is a tough one. but to make it more difficult. I would want to host in different IP addresses.