Write in any way that works for you. Write in a tuxedo or in the shower with a raincoat or in a cave deep in the woods. ~~ John GardnerThe point is not where you write, but that you write. Many new writers ask their favorite authors about their writing routines. It's not important.
What is important is that you write whenever you can. I feel lost if I go out without paper. Now many make notes on their iPhones or Droids when out.
When the mood strikes, be prepared and .... WRITE!!