I missed one trick - "Remind me". you can tell Slack to ping you about any message at a later time. This is great someone asks something that involves more time/effort than I can give right now. two clicks and I'm back at work but confident that the matter won't be lost. The options are (too) limited, but 20 mins, 1 hour, 3 hours, tomorrow, or next week do cover MOST of my needs.