Self-care is vital! And I totally agree about the village, it takes a lot of weight off our shoulders when we have some help.
I'm also a big fan of the agenda - as mamas we juggle so many things, it's impossible to remember it all! Meal planning is a great tip too; I find meal prep on weekends helps me a lot during the week when time is short, and there's less stress about what's for dinner.
The activity bag is a fantastic idea for high-energy days - I find having some new activities up my sleeve is a great distraction and often buy a couple of new things every few months to keep things interesting.