cart training

Hello All, I am new to the driving world, and I would like some advice on how to get your horse to really pull the cart with their hind end. What exercises do you perform in order to help make this a habit to the horse? What do you do in the cart vs. out of the cart? Any advice helps.

It took me over 18 months but I found a trainer that lives really near by. Steve is a nice guy and he loves driving. He is the president of our small local endurance driving club. I found out about Steve when my neighbor hit our mail box. She left a note to say she was sorry. We called her...