I think one disadvantage of being single is that I can only have a limited variety of fresh vegetables in the fridge - otherwise, I don't get through them in time and hate to waste. Thus, weekly, I always buy large flat/Portobello mushrooms & iceberg lettuce (one "leaf" per day and a bit of cold water before going back in the fridge and they last for quite a while); then, for variety, I'll choose a different third veggie - radish, celery, pak choi, cauliflower, etc.