I shop twice a week. Once on the weekend for the bulk of my stuff and then mid-week for produce. I don't make a list but if I know I need something I'll ask DH to remind me. One of us will remember!
I go to the grocery store almost every day. It's literally next to my work and I hate wasted food and it's just shopping for me so I like to go frequently. If I'm doing a big shop I write a list on a scrap of paper