Condolences, brother. Sorry to see that anyone has to endure something so painful as a divorce. It hurt me in ways I have never felt before or since. The only thing I could offer is to keep your head high and know that it WILL be over one day and you'll be cracking jokes about it. As for dealing with it in the meantime, I'm sure that you will be arguing with your former partner.
With that in mind, don't argue with an idiot, they just drag you down to their level and beat you with experience. Don't get ugly with your arguments. Don't insult. Don't be mean or cruel with your comments. Be the better person, take the high road. I guarantee you that it will pay off in the end. I got divorced with two children. Despite all of her attempts to goad me into any kind of "mud slinging" argument, I refused. I even had to resort to hanging up on her from her incessant screaming on the phone. Now, I have custody of the kids and we are great friends with each other. It will be hard, but keep to it. You may think that the hurt won't end, but it will. The scars may remain if you let them, but the pain always goes away.
Best of luck.