moleskine
A popular brand of vintage-feel notebooks that come in various different types, including sketchbooks, daily planners, lined/unlined/checked pages, etc. 

Its claim to fame is that famous artists and thinkers, like Van Gogh, used them.

No pretentious pseudoartist or writer would be caught dead without one.
"Ooh. You have a Moleskine! Can I see what's in it?"

"No way, man."
