Do you have a favourite place to write?
I sit in the comfort of an armchair with my laptop, and a cup of black coffee close at hand. I may read a poem, or a chapter of a novel to get my creative juices flowing. Occasionally, I listen to classical music, but I mostly write and edit in silence.
Do you have a particular routine?
I like the lakeside breeze at sundown.
For yer actual sitting down and writing things out, I'm ashamed to admit that I prefer to work on a computer than with pen and paper. And if I'm on a computer, I like to plug in the old earphones and listen to music. Classical / instrumental preferably, but I can do it with lyrics going on, as well.*
I liked Khai Virtue's reply: When it comes to the IDEAS (for me, the most important part of the writing process), the shower will do fine (even if my usual shower is a garden hose of cold water), though more often it's watching some performance (live or via machine) and getting a tangent idea, or walking down the road with a heavy rucksack, trying to reach a better spot to hitch-hike. If I'm lucky (no, not lucky: well prepared), I'll have a pen and scrap of paper on me to write the thought down.
Then there's bed and the dreams... as long as I can scribble them down immediately and they don't turn out to be absolute rubbish in the cold light.
* One of my best pieces, in fact, was written like this: a short story about an imaginary world in which people don't believe in Heaven (so that they can live for the present), in which no countries exist (so that they can live in peace), nor material possessions. Sorry - I couldn't resist that. But strangely, lyrics DON'T have to interfere.
I live alone in South West France so silence is easily found with not too many distractions. I write better in the mornings than I do in the evenings. In the evenings I tend to follow the Hemmingway method, "Write drunk and edit sober"