How to find 30-40 different sites each and every day and build there a link to your site? Do you use some kind of a software?
There is no way you can build 30-40 backlinks per day manually even though you use a massive man power. And the softwares who claims to do it for you will produce backlinks which are worthless or spammy.
Daily you can do 10-10 Bookmarking,Classified,Directory...
You'll get backlinks for sure.
In my point of view quantity doesn't matter, Matter is quality. You can manage in various way.
It is not depend on the quantity, depends on quality. If we create quality 10 backlinks for website then surely it effects and give back the link surely. So, I don't think so, quantity matter.
this days its not going to work build links based on quantity you must focus on quality links.