I did this thing during my talk: I run a give-away for pictures of the talk. I
don't require it to have feedback, though. Nevertheless I have received so many
pictures with positive feedback like never before for a talk.
https://twitter.com/DanielMacannuco/status/1000056897616084992

Fri, 25 May 2018 17:45:57 UTC1

2 replies

Replying to @coderbyheart

So, it seems the talk was good, but I also gave attendees a reason to create a
reaction to the talk. This worked great to source feedback, which I am usually
not getting for talks (neither good nor bad), even though I always ask about
that at the end of my talks.