If you're looking for a worthwhile endeavor to get the next decade off to a great start, spend the last days of December completing this application. The Crown Heights Community Mediation Center will be offering a Leadership Training Institute starting in January that will train participants in leadership and community-building and connect them to the wider community. The course is a 25-hour commitment in late afternoons and evenings, definitely manageable for students/freelancers but possible even for those with a full-time job. The cohort of trainees will work together on a local initiative, and will doubtless be full of fascinating people.
I talk about ways to build community in the nabe, both with fellow locals and on this blog, but this is a chance to actually take some action. They're accepting applications until the end of the month.