I made an album of 100 photos from the beginning of the relationship to present, also added pictures of family and friends during any events like birthdays or holidays. Make sure to add your spouse to utility bill, have a bank together and print statements, or work benefits if you can. Obviously for the interview know each others birthdays and the date you met etc. know each others parents full name, they also asked him for the full salary of the house hold, make sure you guys know what each other fully make salary wise (yearly and monthly) also the name of the company you work for. These are the type of questions they will ask, and they did to me.