D&D General - Session 0 Tips -- What are your favorite session 0 questions/activities?

I'm going to be running a Session 0 soon, and I want to make it as fun and as informative as possible. What are some good questions to ask the players? The only ones I really have in mind right now are XP vs. Milestone leveling, and the usual questions about tone (silly vs. serious), etc. But I need MORE, so give me your Session 0 tips!

For what it's worth, the Session 0 is for Ghosts of Saltmarsh. We ran Sinister Secret as a one-off and have now decided to run the rest of the book as a campaign.