I live by master lists.  Back to the old concept of getting things out of my brain and onto paper, thus simplifying my life once the initial work is done.  I'll share my master lists with you, and you share yours with us!

Costco

binders: 1", 2"

batteries

page protectors

printer paper

fish

roast

tri tip

ground beef

bagels

pizza

wine

fruit

avocados

grated cheese

cheddar

jack cheese

red cups

Anti-Bacterial wipes

paper plates

TP

water bottles

dog food

cat food

frozen chicken breasts

butter

string cheese

tortillas

sour cream

cream cheese

chips

pasta

spices

sugar (brown and white)

peanut butter

trail mix

popcorn

syrup

yeast

mayo

ketchup

oils

Simplify, simplify, simplify.  What might take ten minutes to type into a Word document will save hours of thinking and rethinking.  Plus, once I have the basics on the list, my brain is free to add seasonal items like gift wrap or swimsuits.