In fact, this problem has long been solved. Besides, many older people think it is wrong to throw away the leftovers. First of all, it is right to be frugal, but throwing away yesterday's leftovers is not a waste today. Because the leftover food was produced yesterday, whether it is the waste caused by too much cooking or the "reasonable" waste caused by the sudden decrease of people eating, waste is a problem that happened yesterday, and today I just make a profit on this problem. Therefore, discussing whether to be frugal when it is time to dump leftovers is similar to discussing whether to educate his children about correct values after a child steals a cow. The result is to use the present "dilemma" to try to cover up yesterday's mistakes. Dumping yesterday's leftovers today means ending yesterday's mistakes instead of making new ones today, which is a misunderstanding of this problem. Secondly, whether food should be thrown away depends on whether the food goes bad and affects health, not whether it was this morning or yesterday, or whether it was just cooked or left over. Leftovers haven't gone bad, so you can eat them if you want, which has nothing to do with thrift. If it goes bad or you don't want to eat it yourself, throwing it out has nothing to do with waste. This mistake was made while cooking these meals. What we should reflect on is what we predicted/planned before cooking/buying these meals, and how to do it now. If you are really struggling to throw away yesterday's leftovers, it means that you have not got rid of the misunderstanding of cognition, are not good at identifying common behavioral traps, and cannot improve your execution.