The online site for my grocery stores are good for making a list, but never tell me where it is in the store. If possible, some store sites do a list by how you add it. I am a bit obsessive about arranging my list around where stuff is, so I'm not zig zagging.

I use self checkout a lot, but at my local one, they ad match, so I have to show screenshots (or Flipp app) to the cashier to do it.