If the email monster has you trembling in a corner, here’s a free game to help. It only works on Gmail accounts, but that was good enough for us (and 200 million other users) as it went through our email like a squad car through jelly donuts.
The game is made by Baydin, which also has plug-ins for Outlook and Gmail to let you schedule the time an email will be sent off, or “boomerang” the email so that it comes back to you at a later time. (Hard to figure the use of that.) They exhort you to get to “Inbox Zero” in 15 minutes. See it at emailga.me.