I keep an inbox of zero. My inbox is a reflection of my mind. How do I do it?
I tell people I don't really use email. It's true because my inbox is usually zero.
I like the Donald Knuth approach to email.
First, I say no to everything. I can do that because I have power.
Second, I value my time, space and privacy above all else.
Third, I have a secretary: if it is important, write me a nice letter. My secretary processes my correspondence and the information is placed on my desk first thing every morning.
I try my best to leave a thoughtful reply within my busy schedule.
This is how I get things done.