Siegfried has many close friends and relatives. it seems like he's always going to somebody's wedding, christening, bar mitzvah, or quinceañera. siegfried enjoys seeing his friends and relatives at these parties, but he tends to overindulge in the desserts that are available. there's a birthday party coming up for his cousin, so siegfried has been trying to visualize some of the things he can do instead of gorging on sweets. what kind of strategy is he employing to change his behavior?