Family business to Holding Co model

Curious to hear from anyone who has joined a family business (either their own or through acquisition) and used it as a platform for launching a holding company. What are the structures you put in place to maintain the successful operations of the original company? What legal structure did you use to pull the original acquisition and additional acquisitions under the holdco?
I would also love any thoughts from searchers who are considering developing a holdco model with their first acquisition.