1.Marriage certificate- Bring the copy if you don’t have the original.
2.Marriage album- Print everything you have, even pictures from the period you dated your ex wife.
3.Child support- Just print the evidence of payments, does your child have your last name ?
4.Marriage invite card- Sure, print that too if you have it.
5.Emails, texts- print everything you have while you were dating, during marriage, I guess you can print and after marriage just to explain what was the cause of divorce. In my case the officer did ask me for the reason of my divorce.
Did you travel while being married? Flight tickets, stamps on passport, hotel bookings all of that can be helpful.
Affidavits from your family, her family if possible, your mutual friends as well. You can find examples of affidavits on this site.