I keep recipes on Pinterest and I have a notebook for planning and shopping. I got it at a craft store, but I used to make my own. It divides the list by category: dairy, frozen, produce, baking, etc.
I plan my meals, trying to use what we have in the fridge and freezer, then add things to the list. I go meal by meal so I don’t forget anything.
When I shop, since everything is already sorted by type, it’s easy to see what I need in each department.
No picky eaters at my house. Sorry.