Food drives are popular this time of year. There is often a big push for food around Thanksgiving and again around Christmas. In many communities there are numerous programs. Here in San Francisco there are several year-round programs, which is a good thing - the need is certainly there!
I don't know whether you think much about these things, but that extra can of tuna that cost you just a buck or the boxes of mac and cheese for about the same price can really help someone who has nothing. If your income is low and you don't have much, don't think you have to donate fifty or a hundred dollars worth of groceries to make a difference. Your can of tuna and your neighbor's box of mac and cheese and the chicken noodle soup that the retired school teacher put in, all add up. Yes, every single contribution helps!
I'm not saying just give one thing - give as much as you feel you are able to. The important thing, as always, is involvement. We all have the capacity to help!