I keep these always: baby spinach, Turkey bacon, tomatoes, light miracle whip, watermelon, bananas, corn on the cob, chicken [already grilled and chopped-you can find bags of them in the freezer section @walmart] pretzels, Bunny Wheat bread, soup, yogurt, grapes, lowfat cottage cheese, salsa and tor...
All you need is a lot of cook books, a package of index cards, and an old photo album.
I created a grocery list form that has columns to list items that are grouped together in different parts of the grocery store (dry goods,meats,produce,frozen foods,cleaning supplies,pharmacy,other). Add items as you think of them. Menus on other side. When shopping menus can be updated as needed.