Some have a special place.
I have a preference of writing in my spare room but since it's temporarily unavailable, I can write anywhere--the kitchen, the living room, or my counter at work.
Some people wear special clothes.
I have absolutely no preference on clothing. I was once in a hotel room, wearing a black formal dress and high heels, minutes from boarding a shuttle to witness my brother's wedding, when an idea struck. Of course, I had a pencil and paper packed in my suitcase.
Some people need absolute quiet or special background music.
Sometimes, if I'm alone in the house, I'll listen to Dave Mathews but I can write during a Yankees game, an episode of Family Guy, or even during the dogfight in Top Gun. The only time I can't write is when someone in my family is talking, even if they aren't talking to me.
Some people have a special pen.
My writing implement of choice is a pencil but when my muse whispers in my ear, I use whatever is handy.
Some people go through a series of motions to get themselves ready for a task.
I make coffee. Usually it gets cold while my pencil flows.
What are some of your rituals?