Avoid talking about Islamic religion in an insulting manner. Even slight criticism or humor is to be avoided at all costs.
Humor plays a part in communicating but its bets avoided using it until a friendship is established. Sarcasm does not usually translate well and it’s best to not make jokes about ethnic and/or religious issues.
It tends to be considered acceptable to interrupt and talk over people during conversations.
When asked to do something it’s best to avoid answering with a direct “no”. The better answer could be something like I will try, or it’s possible. Pakistanis will often answer with "Inshallah" or "God Willing".