Instagram LIVE Tips&Tricks

So Instagram live launched for everyone in the past days!
Does anybody have some tips/tricks to share on how to use it to gain more followers?
Is it a useful tool in any way to boost your engagement? or is it just a fun tool to interact with your audience?
I saw that when you start ur live broadcast you get a lot of viewers in the start since everyone still has their push notifications for live streams on! is there anyway the broadcaster can use this for their advantage?

I think live has been out for a while. I would assume streaming fun events or doing Q&A's, truth or dare, or something along those lines as they always keep people intrigued and concentrated on what you're doing. I would also pay attention to the celebs that live stream and see what they are doing to market their merch, etc.