Ok the best answer should be given by the Instagram coder herself, but let’s still share our experience here.
I found out that best way is by focusing on ENGAGEMENT (warning: it’s a few hours a day work). The idea is to test method of engagement with your (current and future) community members/followers. I shared some of my engagement test findings here: Social Media Engagement – > Ideas that Convert!
And no matter what, don’t forget to sign Influencer-Brand Agreement