DH and I decided that every month each of us will plan one date night. Rules are if the plans require a babysitter, the planner must arrange it. It doesn't have to be a go out date, it can be a stay home date, and if it's going to be an overnighter you must have 2 weeks notice.
This month I'm planning a dinner out for DH and I before we go to a financial seminar we've been planning on attending. My mom is coming to watch LO for us.
Next month, I think I'm going to plan fondue and scrabble night after we put baby girl to bed.