Targeting the Calf muscles with Foam Roller: You must make sure to roll from the back of the knee to the Achilles tendon. Place one foot on top of the other to increase the pressure through the calf muscle fibres.
Targeting Iliotibial band (outside of thigh between the hip and knee), known as the ITB with Foam Roller: You must make sure to roll the whole length of the thigh to target all the ITB fibres. Your forearms will also get a workout doing this one!
Targeting Quadriceps (front of thigh and hip) with Foam Roller: Roll from the hip to the knee to target all the muscle fibres. You can make it harder by holding the leg to be worked in a quad stretch position as shown.