I think GmailZero is perfect for your workflow. You can set your goal as inbox 1...

dreeves on June 13, 2012 | parent | context | favorite | on: The Gmail Zero project: commitment device for Inbo...

I think GmailZero is perfect for your workflow. You can set your goal as inbox 10 instead of inbox 0. I could also see an argument for inbox 25 or whatever fits on one screen. Or maybe inbox 7 as the number of things you can hold in short-term memory...