Start with holding your partners hand and start to move him around you and up and down as he follows without tension. After a while add your body and other limbs to this in order to bring him down to the ground by creating movement in different directions at the same time and having him feel the motion. Now add your partner resisting from time to time by tensing the body parts under the lever, by using power to move you or by creating a lever of his own. This will teach you both to remain relaxed as it is fitting the situation and to adjust to reality as it moves. If you are learning alone roll on the ground with parts tensed up and others relaxed (for example from standing up to down and up again with your left leg tensed) or lean on the wall and roll around standing up with one or more body parts tensed in a certain position (for example your hands held behind your back, left arm stretched to the side, legs entwined and so on) It is important to know when to use relaxation and when to create tension in your body to survive and do the work (In that order)