Make checking your messages part of your routine, as opposed to an interruption of said routine. More concretely, set certain time windows of your day, be it ho

Make checking your messages part of your routine, as opposed to an interruption of said routine. More concretely, set certain time windows of your day, be it hourly or every 4 hours, where you check Slack and reply to relevant messages, after which you drop it again until the next window. Turn off all Slack notifications (or close out of it all together) and set daily and repeating calendar events that say “check Slack” to pop up instead. That’s how I’ve setup all kinds of reoccurring but otherwise distracting tasks and it works great.