Well, belief plays a large role here. Expect the best and prepare for the worst is a good way to tackle this in my opinion. If you pray, ask God to grant you that which your heart desires. You've done your part and you leave the rest to him. Taking action when we ask for something is a huge part. We can't just wish for things and do nothing. Now that we've put our best effort, it's time to enjoy the next step.
I like what business said, to prepare for your son's arrival. This is part of belief and trust. I personally purchased a sippy cup for my son. I actually purchased a 2 pack and gave one to his big brother and saved the other one for him. I also chose his name as well as a name for his sister, in case she arrives first. :)
I await my egg now... :D