How to Remember Everything You Need at the Store

Okay, so this never actually works for me.  I still always forget something.  And I usually remember at a point when I am unwilling to go back to get the thing I forgot.

I usually start with a mental list of things I need, including the things I forgot last time.  By the time the list gets to about four things, I will no longer remember everything unless I write it down.  But by the time I write it down, some of those things have already slipped my mind.  So then I feel compelled to go through sub-category lists.  Do you do this?

First, FOOD.  What do I need for:
breakfasts
lunches
packed lunches
dinners
snacks
treats
drinks
food storage
etc.

Second, PERSONAL ITEMS.  Do I need (top to bottom):
shampoo
conditioner
soap
razors
contact supplies
q-tips
tissues
tooth care items
chapstick
makeup
deodorant
lotion
etc.

Third, CLOTHING and ACCESSORIES for:
Me
Bryan
Caleb
Savanna
Joseph
Isaac
Benjamin (including diapers and wipes)

Fourth, do I need items for my HOUSE:
kitchen
living rooms
bedrooms
bathrooms
outside
etc.

Fifth, I walk through each DEPARTMENT of the store in my mind to jog my memory of what else needs to be on the list:
hardware
toys
office supplies
home
electronics
jewelry
pharmacy
shoes
garden
auto
crafts
etc.

Sixth, is there anything that is IRREGULAR or RANDOM that I need?
gifts for birthday parties
chains for my tires
photo prints
etc.

And then I still always forget something.  And often I remember something as I walk past it in the store, which means I have a hard time sticking to my list.

Also, 7 people are expensive.

The end.