The video below is admittedly old (Oct 2007) and has done the rounds before but I only saw it recently and it’s made a massive difference to the way I work. I find myself devoting less time to e-mail but getting more done. It’s also a big morale boost to see an empty Inbox folder 🙂
There’s a site dedicated to the practise as well (Inbox Zero) although a few of the links there are dead.
I know the video’s long, but trust me on this one. Watch it.