Now when serving the meal, not unlike food prep, you have to watch certain things. If your reception venue or caterer provides servers, then you're pretty much done in this area, but if you did everything on your own, it can get dicey. Why dicey? Because you have to either find a group of people to serve the food, or you have to use a group of your own wedding guests.

What I recommend:

For when your venue or caterer provides servers: A caterer that usually provides servers will also usually serve food buffet style; a venue like a banquet hall or hotel that provides servers usually serves food directly to the tables. For both, make sure they provide enough people. If they serve tables, you don't want a server to have to serve more than three tables, maybe four. Otherwise guests will be waiting for a long time for their food. I was at a wedding once where the room was split in half, and one server had one side, and one server had the other. From the time we sat down in the reception hall to the time we were served dinner, we waited 90 minutes before our table saw any food. I was one hungry girl. If they serve buffet style, you'll want them to provide enough people to both serve the people in line, and to keep the food full. Honestly, once you choose a venue or a caterer that provides servers, it may be hard to get extra personnel without paying extra, but it's a question you'll want to ask when deciding on the hall and the caterer, because it's a very important component in a smoothly-executed reception.

As for when you have to find people to serve your own food: I wouldn't go the serving-tables route, because that would require a lot of kitchen people and people just for serving. First, stick to buffet style, that way you don't have to find a lot of people. Also, even if people are willing, I would also avoid asking people that you invited to the wedding to also serve the food and work during the wedding, as the point of inviting people to a wedding is to invite them to celebrate alongside you. I would ask friends and family if they know people that can serve the meal-then pay them-and use those people. That way, all your guests can enjoy your wedding, and you're still getting reputable help. I know people that have gone this route.