One way to remember a list of objects (like a grocery list) is to visualize each item in a particular place in your house.
For example, you may visualize the broccoli on your nightstand, the tomatoes in the sink, and the apples on the couch. When you need to remember the grocery list, picture yourself walking through the house and seeing all the objects in their unusual places.
Making associations like this will give your memory something to grab onto. It’s much easier to remember tomatoes in your sink than it is to just remember tomatoes!