Others begin writing as soon as they have a sentence. Some writers need absolute quiet and no lights in the room other than a computer screen. Others play music in the background and work best under bright lights. Some writers need an absence of visual distractions, preferably a blank wall or windows with closed curtains. Others choose environments that are filled with color and paintings and posters and photos give them a sense of comfort and relaxation.
Writers develop writing rituals.
Some writers walk around while drafting ideas and may need a high degree of physical movement throughout their composing period. Others need chairs they can sink back in periodically. Some have such an advanced ritual that the ping of a computer turning on can trigger a drafting sequence. Others walk for five minutes before writing. Still others do creative meditations and others review notes.