N.W.
I have one master calendar for the whole family: the Boynton Mom calendar.
I made up shopping lists on my computer, print them out and post them on the fridge: Costco, Groceries and Household Supplies. When we are out of something, we just put a check by the item on the proper list.
I have a packing list, too, so when we travel I can print one up and easily gather all the stuff we need.
My purse is tiny and I throw it into a big tote bag along with everything I need for that day: coupons, library books, workout clothes, maps, glasses... The tote bag usually stays in the car and I just grap my purse and whatever items I need from the tote bag for each errand.
When bills come, I open them immediately, write the due date and amount on the front of the envelope and file it in my desk organizer in order of due date. Then I flip through them every couple of days and can see at a glance what needs to be paid next.