If you’re passionate and dedicated and intend to get your writing done, buck up and do it. If you don’t have your perfect Moleskine with you or you left your lucky pen at home, then write on something else. Use a napkin. Use a crayon. Write. Get it done. Put your words into something so that you can look at them outside of your head. Get the first thoughts out. Get your notes into a format that will generate a real piece when the time is right.
via Chris Brogan’s The Myth of the Perfect Writing Environment.