The most tried and true way of getting big numbers is to reach out to every individual in your circle directly. After that, it can be a big help to get an influential friend/family member or two to do some reaching out on your behalf.
There are dozens of other avenues to consider, but their success rate really depends on the individual. Some people are great at pitching to strangers in a coffee shop/comic book store. Other people are able to turn their twitter followers into buyers. Not many people are able to get press coverage, but those who have typically get some mileage from it. You know your skill sets and abilities best, so this is the time to test their limits.
Definitely check out the older posts on the goodreads forum, as there is a TON of advice on there from successfully funded authors.

Chris Inkshares is a lonely place.. that’s why i personally advise new authors to do some preperation work and 1) get a solid Inkshares followers base before luanching 2) make sure the manuscript is nearly done, because the campaign is consumming....

As someone who saw, liked and ordered your book - I can only suggest bugging your base from home, i.e. friends/family so u gain momentum.

My advice would be to get as much art as possible up on your book page. Even though Inkshares is a book kick starting site we are still very much visual creatures that respond positively to eye candy. That being said some thoughtful formatting of the text on your book page can make it pleasing to the eye and go a long way. Check out my books page. I get a lot of comments on its layout.

Hey all, I’m trying to drive more people to Seven Days Dead.  You can check it out at https://www.inkshares.com/books/seven-days-dead

So far I’ve done the facebook mentions.  It’s a zombie book so I’ve gone to about 5 to 10 zombie related sites and tried to get them to feature it.  Only one really got back to me and hasn’t put anything up yet (just shot them another email today).  Went to authors on Inkshares, promoted their books to my followers (about 100, and I’m following a little over 400).  I only have 20 orders to date and even though I’ve gotten about 9 recommendations and a couple of killer reviews...I’m stalling out.

I’m not sure what else I can do to get people interested in this with a limited social network footprint.  Any ideas?  Any help would be greatly appreciated.