Best 2 piece of advice i got were
1) Read chapters 7-12 of this book about sleep:
https://www.amazon.com/Happiest-Baby-Block-Harvey-Karp/dp/0553381466/ref=nodl_
Do it before the baby is born so you can digest it. Maybe its the method, maybe we just got lucky but DD has been a great sleeper and I swear by the swaddle and the white noise etc.
2) Work toward getting the baby on a schedule. Even now my 15 month old is on a schedule and its so beautiful. She is tired when its time and she seems to lean into the routine.