http://www.plumpub.com/info/Articles/art_pairedsets.htm
After you and your partner have learned and practiced the pre-arranged sequence the next step is to change that set. Throw in an occasional strange move, alter the angles of attack. If you go too far astray return to the basic set, slow down and analyze what you've done. You like gymnastics? Throw some in. But try to keep the basic integrity of the set real. This is your bridge to freestyle from another angle. Because most people are so unsure of themselves they don't experiment much in freestyle. They often don't feel the style their practicing. Partner sets are half and half: half the raw fear and adrenaline of freestyle; half the classical moves you are practicing. What a combo!