There is so much to be said for literally moving to the music you are learning. You don't need to have training in dance. In fact - it may be better not to (as you can then feel free to do what is natural). Listen, imagine, feel, and just move. Explore the sound, the moods, and the energy. Do it a few times and develop a sense of the structure and start to tailor the movements to the phrasing.
I just started the Poulenc cello sonata this morning (the piano part!). I spent some time practicing it, and then felt a desire to explore it in a different way. My vision for the first movement quickly solidified into an exchange between two moods/characters: a spunky "petite marche militaire" and a graceful, feminine picture of elegance with a tinge of wistfulness.
Now, when I go back to playing it, I have a more inspired sense of what I want it to feel like within me as well as how I want to communicate it to the audience.
Elizabeth Borowsky is a pianist, teacher, and composer. She is a Nationally Certified Teacher of Music in Piano (Music Teachers National Association).