work well with your "cycle". there are certain period(s) of the day when writing is effortless. try to experiment. maybe you produce exceptional results when you write in the morning or late in the evening. it depends on what you are used to.
you can also try to manipulate it by having fixed writing schedule everyday. that way, your mind will be conditioned to write during certain periods of the day. one more thing. find a perfect place to write. it would help if that will be the same area that will use every time you write. hope these help!