I split my email addresses into 5 (private, university teaching, research, commercial work, side business), and use different computers (though fewer than 5) fo

I split my email addresses into 5 (private, university teaching, research, commercial work, side business), and use different computers (though fewer than 5) for different jobs. In part that was forced by my commercial employer's trade secrets etc. I find the friction to rapid swiching that this division of communication channels and tools introduces quite helpful for focus.