Establishing habits in children as early as possible is a parenting benchmark and a cornerstone of adult self-care. When children push nighttime boundaries, parents become chronically over-tired. That makes them less likely to maintain the necessary routines in the first place, which sets up a vicious cycle.
A gratitude journaling habit may seem sort of hokey at first, but it's really not if you dig a bit deeper. As a rule, humans like happy, nice and generally good people -- and the surest way of becoming the sort of person that you would like and approve of is to cultivate habits that lead us in that direction.