You can not really hack growth. Growth hacking as a quick fix for marketing and innovation in product development is doing more harm than good. In reality, Good product that markets itself. The often cited earlier examples of growth hack are Paypal (Invite your friend link) or Hotmail. Its not incidental that both Paypal and Hotmail were backed by a successful product which was solving a pressing need.
A similar experiment by Google+ fall flat despite having all the reasons to be successful. A number of other similar experiments by google did not meet with remarkable success. I am sure, some strategies listed below can fuel your growth but its not a replacement of a great product, AWESOME user experience or a pressing customer need which your product solves.