Forget Inbox Zero… Yesterbox Zero is the sweet spot! With Yesterbox Zero, I have to have all of yesterday’s email processed sometime today by 9 pm (i.e. my daily stand-up meeting with Andrew and Arthur Zey).
As a result, I tend to answer only important or interesting emails on the day that I receive them (as opposed to fussing about every new email because I want to stay at Inbox Zero), and then I answer all the rest sometime on the next day, usually in the morning. Then, my inbox is clear to receive this day’s mail. So I delete the unimportant stuff, answer what I please, and leave the rest for later. (I’ve never been able to do a “reply later” folder, as GTD recommends… that’s just a black hole for me.)
As a result, since I cleared out my inbox after SnowCon (when I had about 20 messages languishing in my inbox, which took about 5 hours to process), I’ve spent just 1 hour per week on email. It’s amazing. I’ve felt oppressed by my inbox for years, and just this one small change has made so much difference.