I have a theory about email: you can delete anything 21 days and older, and it won’t matter. I often do this for peace of mind. The assumption is that if the email were important enough, the person will follow up. I figured this out when I’ve lost my entire inbox and noticed that no one complained about not getting a response.
— Guy Kawasaki im „How I Work“-Interview, bei dem es sich nebenbei gesagt, um eine wirklich lesenswerte Interview-Serie von Lifehacker handelt.