Putting the shopping list in store-order before I go into the store; saves so much time and fuss in the store and makes me feel like a hyper-efficient grocery god.
We are cut from the same cloth you and I. It's off the utmost import that everything is in its right place because I don't like spending an hour at the store.
Unfortunately, I frequently forget lettuce. I should probably cross items off as I go, but if a head is lettuce is the one casualty I can accept that.
I wish that our store layouts were consistent enough for this to work, I have to change my list order if I'm going to a different store, and remember idiosyncrasies like in one the condiments are at the entrance before produce...maddening!