Breakfalls are extremely important since they allow you to land from throws as comfortably as possible. The side breakfall is one of the most common breakfalls. Shown here is a simple drill for the side breakfall.
Standing with your feet level, take your right foot in front and to the left of your left foot resting the side of your foot on the floor.
Allow yourself to fall to the right. As you land, you should throw your right arm on the floor. This breaks your fall as it takes most of the force.
Bring your left knee up to protect your groin from possible kicks. Also bring your hands up to your face for your guard.