Project See Them Help Them is pretty simple.
If you see a homeless person post or share their exact location using Google location
and anyone within or nearby that area can visit the location and bring
food, warm clothes or anything else they think would be beneficial to a homeless person.
If unsure about what to bring them, why not go and strike up a conversation with them and find out
what kind of things/items they might be in need of.
If you have no means to give something tangible, consider getting to know them just to let them know
that someone cares about their existence. Afterall, homeless People are People too.