We have found ordering an appetizer for our kids is also a good option. We love our salads and soups in this house. I will often get a full meal and our older daughter just orders a bowl of soup. We then share and have more than enough food for the two of us and still get our favorite appetizers. When we are on the dining plan, we pay for her appetizer out of pocket, and then use the exrra credits to help pay for 2TS meals, such as Hoop Dee Doo.
On the dining plan, when we add an appetizer, it ends up giving us an appetizer to share, an entree to split, and a dessert to divide between the two of us, and it ends up being the perfect size for the two of us.
My teenaged son, however, uses his table service credit, and orders an appetizer out of pocket, and then usually finishes off anyone else's leftovers. He is the only member of the family who actually comes out ahead at a Disney buffet.