We get used to things, and we like reading the way we're used to reading.

Australia is one of the few places that I can think of where the cities, at least those I've been to, seem to have strikingly different characters and visual textures. To an American like me, there's basically Melbourne, Sydney and Brisbane and the rest is all bush.

It's hard to predict what will happen as reading on screen becomes more of a universal norm, and when the formats dictated by social media - Twitter's 140-character limit, for instance - start to influence what we're used to.

In the US you have New York, San Francisco, Los Angeles, Boston, Miami and dozens of other cities; a few of them have a really strong visual character. But even with those there is just too much space between them and too many people.

A simple MS Word document, or a Powerpoint presentation, has its limits, particularly the unpredictability in how the page will actually display. With a PDF, you are locking down all those variables.

A good cook can make something amazing out of even the blandest ingredients. Still, you don't want to eat the exact same dish every day.

I have a bunch of calendars I used before I went digital. Every once in a while, I'll open up one from 1991 and look at all the names and appointments and things that, at the time, seemed so important. Meetings that I was really worried about, things that I was getting calls four times a day about, and I wonder, "Where did it all go? Where are they now?" It's so strange, everything has disappeared. The only thing that stays behind is the work.