Winter takes some getting used to. While there are great recreational opportunities in winter, we're usually content early in the season to hunker down and just try to stay warm. And yet I heard the other day that the average American gains 10 pounds between Thanksgiving and Christmas. If ever there was a time to get out of the house, it's during this stretch.
Below are some resources for ideas, but consider also very local resources to you. Here in Norwell, the North and South Rivers Watershed Association has a great "get outdoors' tab (linked here).