Inbox zero means having zero unread emails in your email’s inbox. I have an OCD for it. Photo: Fraser Valley, British Columbia, Canada. Many years ago, like many people, I used to “mark as unread” some emails I received, when I cannot decide to reply or not reply immediately for whatever reasons. Obviously, pretending things as unread is not an effective strategy to get them done. I didn’t reply to the things I want to say yes quickly enough, which could make people think that I’m not …