Any advice for someone starting the actual divorce process?

We will be starting it soon and will be using two lawyers in a collaborative process. I still have a lot of emotion about the break-up of the marriage and want to get through this process as civilly as possible without cracking up or rolling over. I don’t expect him to be unfair but I will be looking out carefully for my own interests. Any feelings or personal experiences to share? (I want only the nice divorced people to answer.)