Just a suggestion for those who have vegetable gardens (you do have a garden, right? LOL):
Sharing a bumper crop of tomatoes, zucchini, cucumbers, etc is a great way to serve your neighbors! When I run down my mental list of people who I can pawn yellow squash onto, I think of my friends and family first, even though they may live across town. Surely there must be people in the neighborhood who would appreciate some extra green peppers! An especially good thing about sharing homegrown produce is that it doesn't require a reciprocal gift or a thank you card (its not like you're taking them something expensive/fancy so they'll feel like they have to get you something, too). Its just sharing.
If you don't garden, or if you haven't produced anything worthy of sharing this year, you might find opportunities to share in other ways (like when your aunt gives you 17 giant squash, or you pick 3 buckets of blackberries behind the elementary school)