Resharing this as a response to the post by Krabby Paddy below.
The usual caveats: I wrote this out of experience and this isn't anything official from the mods. Always obey mod posts for whatever kinja space you're in. There's a lot of gray area in this, not hard and fast rules. I also wrote it before SUPER DUPER NEW KINJA 20000X LUXURY EDITION TIGER++ so some of the info isn't totally up to date, though the principals are all the same. And I'm still looking for suggestions of things to add, as always. Enjoy.