Every time I ask coaches to spend 20-30 minutes planning a conversation, they come out of it with almost visible light bulbs above their heads, with epiphanous smiles on their faces. Yes, it is that powerful of an experience. It makes you feel confident and prepared, it deepens your empathy for your client, it warms up your mental pathways so that the words have already coursed through them and are primed to come out in the moment.