How many backlinks i have to done?

Hello i have a website with alot of content, and i have about 400 organic visitors daily my goal is to get about 5000-10000 unique visits, and i have about 70-80k backlinks:
web 2.0
classfield
wiki links
bookmarking
edu/gov links
blogs comments
and so on... how many back links you think i have to do? to success on my goal?
how often i have to do backlinks? to make it look natural...

I think you need to focus more on your position in the search engines rather then how much back links you need. You should try targeting some long tail keywords to bring in some more targeted visitors.

do you have any tutorial how to target keywords and so ?