Baby#2 feeling like I'm forgetting something

Cassandra • -Son born 5/9/13 -Daughter born 8/16/15 -currently pregnant w/baby #3 (girl)
My son just turned 2 so it's not like I did this too long ago but I feel like I'm forgetting things and what to do/when to do it  im not worried about when she arrives just preparing 
Anyone else?