1) Chit Chat (during Nightly Check-In) Nightly Check-In These are super core, awesome, daily possibilities for getting to know each other
2) Extra Chit Chat Questions Endless get to know you fun for drives, vacations, waiting in line, "Private Retreats", family time, dinner etc.
3) Particulars Some long overdue spouse Trivia
4) Free Form Your mission, should you accept it is to just make up questions as you go. See how open ended you can make them. This is especially cool if sometimes you don't want to have to drag out your phone to look up some questions.
5) Write & Share Truly a path to intimacy.
6) Face to Face A little more challenging, but perhaps even more effective than "Write & Share."