I'm an e-mail junkie though I'm trying to read my in-box only twice a day and to answer all at once.
I get a lot of email, so if you're sending me an email, if you want to rise above the clutter, put something on it: say, 'Hey!'
We're at the point now where the challenge isn't how to communicate effectively with e-mail; it's ensuring that you spend your time on the e-mail that matters most.
A lot of times, people send me emails, and then I forget about them, or I never respond to them, or I respond to them weeks later.
Oh, some day I'll tell you about why I wrote more than 1,500 Gmail filters. They throw away more than 300 emails every day. Every day. It's the best thing I ever did for my productivity.
The challenge of email is that people send you stuff for free, and it becomes items on your to-do list.
If you spend your time away from work looking at emails and making sure your inbox went down to zero, that's not an effective way to spend your time as a CEO or an entrepreneur. Often times, those emails aren't that important.