One of the fundamental rules of professional writers is that they write regularly. They set aside a time and a place that they retreat to each day, and they devote the time to advancing their thoughts and their works.
I agree that finding rhythm to my writing can be as important as finding voice. Neither, however, can be imposed.
Writing is about content and connection, and that requires inspiration and reflection. I often scribble margin notes during the day, capturing stray thoughts that I want to return to. Sometimes they whither into insignificance as soon as they escape my mind, other times, they trigger a generative stream that demands time at the whiteboard to think things through. If, a day or two later, they feel well formed and potentially interesting (that is, they qualify as ‘cocktail chatter’), then I have the motivation to sit down and organize my thoughts for the blog.
Some people are good at shooting a spontaneous tweet every day, and NaBloPoMo promotes the simple virtue of daily scribbling (National Blog Posting Month: Post every day for a month; that’s all you have to do). But it’s just never going to be that way for me: content trumps schedule.