From personal experience with Model UN, there are two possible goals from any given model UN conference. The first is to have fun. This is actually easiest when you are a controversial country, like Cuba, or DPR Korea. This way, you get to yell at people, and make fun of them, and sometimes make everybody laugh.
The other course of action is to get a warm and fuzzy feeling inside. Even if you only artificially make a step towards curing terrorism, world hunger, or creating world peace, it makes you feel good and hopeful.