Here's what I have found helps: 1. Mute any channel that you don't absolutely need to have active. 2. Use the slack-calendar integration if it's available for

Here's what I have found helps: 1. Mute any channel that you don't absolutely need to have active. 2. Use the slack-calendar integration if it's available for whatever calendar solution your team uses. 3. Add meetings in your calendar for yourself for doing work. Many people at my company will label these as "focus time", "Heads down on project work" or the like. Depending on the slack integration, it will show that you are in a meeting. If not you can set your status to something like suggested above, and you can mute your notifications for the duration. I'll often additionally let the people I work closest with know how they can get hold of me if something is truly urgent "Hey, I go super heads down on project work from 12-5 most days, if something super urgent comes up you can call me at ###-####".