If there could be a way to integrate Evernote into Slack so Notes/Comments/pictures/etc. could be added from a conversation into your notes (either in a general place or specific location) instead of having to copy and paste everything.
So if there was an interesting conversation or a talking point, I could select that Message in Slack and somehow tell Evernote to pull it into a Notebook. It would create a link to that message so I can locate it in future if needed.
Also, you could have an integration where Notes can be written straight from Slack into Evernote