It used to be my writing habit was to go anywhere that wasn't my house that I could sit at a table and have coffee next to me for hours and hours and write. My favorite was the local greasy spoon with a mild variation of other coffee shops depending on the time of day. Then I began working early in the morning, and the bus would get me to work 45 minutes early, and I would use that time to write. Now I get up at 5 in the morning due to my work schedule, so that I can write every morning. I might not write anything worth reading, but usually an idea or two pop up. So far, I enjoy it.
but if i had my 'drutheres, I would have unlimited coffee by my side and wouldn't be able to keep my knee still for so much java. The ideas really flow then...it's just the concentration on one subject at a time that is lacking :)