A reader recently asked me, "How do you deal with an incredibly full inbox that makes you feel like a jerk?"
I'm happy the question asks, "how do you deal." An inbox is as personal a space as an underwear drawer — we all have one and are all embarrassed by both its organization and contents. Thus to tell someone how to manage their inbox could be perceived as an intrusion into their undergarments.
And that would be inappropriate.
What is appropriate to share is my own principles of inbox management: