All impede writing.
Administer in small doses
Of the pants
On a chair,
Or a grassy knoll.
A pen or a pencil or the end of a burnt match.
A piece of blank paper, the back of an envelope,
A chalk board, or the living room wall
And the ability to move one's arm.
It's all the written word requires.
Don't let your most creative work
Be your excuses.
Find something else to occupy your time.
Saw wood per Mark Twain.