If there's one thing that people with act of service love language enjoy, it's a trip that's already planned. Because nothing says "I love you" like a weekend trip away (via Gift Willow). But when it comes to Christmas, you're going to need to think about the planning as a gift. 

Everyone likes seeing presents under the tree — even people who are an act of service love language. Take your trip one step further and print out and frame the itinerary that you've created. Not only will the person love seeing that everything is taken care of, but it's a nice little souvenir from the trip you took.