Tips for 2 under 2

My partner is 39 weeks pregnant. We will have our 2nd child in the next few days. We also have a 20 months old son that goes to daycare close to home during the day. 95% of the time, he sleeps all night from 7:30PM to around 6AM (hopes he keeps that up).

I will take 5 weeks of paternity leave after baby is born. We did lots of meal prep (freezer is full), nursery (all of the home) is ready, shopping for baby gear is done, we talk to our son about the baby coming, etc.

For those that have been there, what are your best tip for managing 2 under 2?

Thank you all!