This morning I have been cleaning my shrine and the whole area around it in preparation for a week of retreat beginning tomorrow to coincide with Losar, the Tibetan new year. Since the retreat will focus on kriya tantra practice, ritual cleanliness is more important than with more conventional meditation techniques (Alexander Berzin explains this in two excellent talks on kriya (action) tantra found at his website).
As a preparation for retreat this has, for me, achieved a dual purpose of allowing my mind to become more aware of what is to come, and also developing a clarity of purpose and focus. This second development was somewhat surprising to me, although I imagine that most of us are aware of a similar effect which comes with spring cleaning of any kind. Combining a spiritual focus with the cleaning work seems to make the mental clarity even more profound, and is something I will be seeking to utilise again.