One of the biggest worries for parents having their second or third child is how will the eldest kid cope with the new sibling. Start them off on the right foot by making the 'welcome home' a special occasion for the siblings.
You are the Leader Sibling. You can change the course of your generation and may not necessarily be the oldest sibling. However, your opinions can come across as a little pushy. (Well SOMEBODY has to lead that clown parade ;