Over the years, novelist Neal Stephenson (wiki), has had at least a couple different pages where he's explained why he's chosen to limit the access he provides via email, interviews, and phone calls. It appears to be something he's given a lot of thought to.

Via Jessamyn, here's an Archive.org mirror of an older version of his page where he explains his introversion and need to stay focused on his work, alongside FAQs that answer many of the questions he typically has to field. Read it all though. It's pretty good. Stephenson's bottom line?

I simply cannot respond to all incoming stimuli unless I retire from writing novels. And I don't wish to retire at this time.

And here's another well known piece, Stephenson's "Why I am a Bad Correspondent", in which he lays out more details about why he's chosen to create an expectation based on guarding his attention so slavishly:

Obama on Vacationing and Time to Think - NYTimes.com

I like this snippet of accidentally-captured conversation between Barack Obama and British MP, David Cameron. Cameron asks Obama if he will be taking any time off for a vacation this summer:

Mr. Cameron: Do you have a break at all?

Mr. Obama: I have not. I am going to take a week in August. But I agree with you that somebody, somebody who had worked in the White House who — not Clinton himself, but somebody who had been close to the process — said that should we be successful, that actually the most important thing you need to do is to have big chunks of time during the day when all you’re doing is thinking. And the biggest mistake that a lot of these folks make is just feeling as if you have to be ...

Mr. Cameron: These guys just chalk your diary up.

Mr. Obama: Right. ... In 15 minute increments and ...

Mr. Cameron: We call it the dentist waiting room. You have to scrap that because you’ve got to have time.

This encourages and inspires me. If people as busy as these two guys (or Bill Gates, for that matter) can make time to rise above the noise, it's hard to imagine why each of us wouldn't want to occasionally unchalk our diary enough to try something similar.

[via Mrs. Mann]