In the quest to reach Inbox Zero, any wisdom is welcome. Marketing Coach George Kao slots one time of the day to handle all this email, and eggs himself on by saying "Next, next, next" to himself as he goes through it.
When you process your inbox at a set time of day, it helps to also create an intention to process your email quickly, like a game. Say to yourself "Next, Next, Next," as you delete or archive most emails, rather than spend time with each and every email.
Of course, you might get important mail throughout the day, so Kao suggests you check your inbox on an hourly basis. And here's how to stop avoid checking it all the time: close that tab when you aren't using it. "It makes you less tempted to check it every few seconds," Kao says.
His full post has several other tips on getting to inbox zero. (We'd be wary of the suggested system of making folders though, as they might actually decrease productivity.)
A System For Email Productivity [Medium]