This is precisely why I love using Ulysses and iA Writer on my Mac/iPhone/iPad.

Both applications afford me to write wherever I am.

• Killing time at the airport? Writing.
• Waiting for lunch at a restaurant? Writing.
• Travelling on a train/bus/plane? Writing.

Freeing yourself from the constraints of a ‘place to write’ stops you from time boxing at a location and feeling guilty for being distracted.