I would second what several have said....beer. Also toss some ribs or steaks on the grill. Call up 2-3 friends/neighbors/etc. and invite them over to sample the meat and have a few cold ones. Once you get them there, "hey, could I get you guys to help me with something real fast". Works every time. Just be all set to go when you get them there so all they have to do is walk in, lift, and get to drinking beer. It also helps if you have buddies that are interested in your project. Sometimes they get to participate by proxy. Just be careful, sometimes, they end up coming around too often to participate.
