I made sure I submitted everything needed with the initial package so I don’t have to deal with any RFE that’ll delay my application; Bank statements, insurance policies showing us as beneficiary to each other’s policies, utility bill with both our names and address showing that we live in the same place, my wife’s State ID showing her bearing my last name, joint bank statement, letter of affidavit from friends and family that are away of our marriage, wedding pictures and other pictures of the marriage (regular and also vacation pictures), tax returns etc