After learning to cook etc. getting rid of bad meals is the next issue cooking for multiple days and all these things are good but for one based on your income you can't afford to buy certain meals. and not only that during the working world based on the location certain food areas are way out of reach.
So two important things to learn so far in your working career. is to know how to store food but know when to get rid of bad food. the bad food can cause a lot of health issues. So get into the habit of getting rid of bad food will make one you're more aware of the food your wasting, and prepare meals accordingly as your income will not be able to sustain you throwing away meals like that. but at the same time it will get you to learn more about the limits of the items you have. e.g. fridge spaces etc. and able to manage meals accordingly