Praising a new contact's personal appearance and paying her compliments like she was great are good ways of building rapport.

Praising someone's personal appearance can come across as insincere or superficial, and it may not be well-received by everyone. It's better to focus on finding common ground and shared interests to build rapport. Additionally, making general compliments like "you're great" without any specific context can also feel insincere and lack substance. It's better to provide specific feedback or ask thoughtful questions to show genuine interest and establish a connection.