1. You need to pitch in. Head to Grand Army Plaza for the Friends of the Berms Park Cleaning & Greening. Meet at the corner of Vanderbilt Avenue and Plaza Street East at 10 a.m.-12 p.m.
2. You need a free lunch. Who says there's no such thing? Head to Franklin Avenue for the Barboncino Neighborhood Appreciation Day Free Brunch, which the pizza restaurant is holding in celebration of its first anniversary. 781 Franklin Ave., 11 a.m. to 3 p.m. Free.
3. You need music. There's a lot going on right in the nabe tonight, including The Bloodshots at Branded Saloon (rockabilly) and City Dwelling Nature Seekers and DecaDence at The Way Station (arty/rock/Americana and regge/soul/accordion). But if you're willing to go further afield, head Prospect Lefferts Gardens for Drums of Thunder, which organizers call "The World Cup" of drumming competitions. 790 E. New York Ave. (Mahalia Jackson Middle School), at East New York Avenue, 8 p.m. $20.
4. You need to get the kids out of the house. It's supposed to be a beautiful (if nippy) day today, so head to Prospect Park for Race Around the Farmyard at Lefferts Historic House (Use entrance at Empire Boulevard and Flatbush and Ocean Avenues), 2:30-3:30 p.m. $3 adults, free for kids. While there, your kids can also hop the carousel, which is only open for another month, or visit the Prospect Park Zoo, which has keeper chats and other events for kids throughout the day.
5. You need to know if your train is running ... and if you have to move your car. There are no planned service changes affecting Prospect Heights all weekend, according to the MTA, though there are weekend subway changes between Franklin and New Lots on the 3 Train and south of Prospect Park on the Q. The next alternate side suspension is Friday, Oct. 26 for Idul-Adha, according to the NYCDOT.