I think Dino's answer is the best so far. Honestly.
The meaning of life shouldn't be some inane single sentence or trite moral or anything like that. It should be more complex, and it should be different for everyone. For instance, Splat's meaning of life (the first one he posted

), though meaningful to him and certainly a valid opinion, is meaningless to me because we have very different beliefs.
I don't have an opinion about the meaning of life. I wish I did. I'm not even sure that life has a meaning. Maybe one is supposed to make it up one's self.