Ask HN: What are your best tips for a good slack group?

I’m in the process of making a slack group for my colleagues and I to share knowledge and iterate on some internal software.

We’ll be sharing things like case studies, have long running conversations on a single question, and then general QA.

The reason I’m choosing slack is because of the private messaging, mobile notifications, and everyone already has it installed.

However, I tend to prefer FB groups style communication with dedicated question/ answer threads.

For those who have been in good slack groups, what were the components that led to success?

Are there was to avoid making conversations challenging for new people to enter?

How do you recommend splitting up channels and threads?