Best word of advice is to get as much sleep before the baby is born as possible. You WILL be sleep deprived for the first 3 months at least and having no sleep debt going into it helps A LOT. She might not be able to get sleep easily the third trimester so she should start stacking up on sleep the 2nd trimester when things are typically calm.
More info on sleep debt: https://en.wikipedia.org/wiki/Sleep_debt
Having a good routine and get good sleep is very important. Thanks for the tip 😊