These are some of the most popular jobs in the US, compiled in one list of jobs many Americans have. On December 5th, 2016, Amazon revealed they will be launching a new grocery store called Amazon Go that will eliminate the need for cashiers.
A typical mini refrigerator will take at least four hours to cool down after being plugged in. If time permits, waiting a full 24 hours will ensure that the refrigerator is completely cooled to the temperature to which it has been set.
If you have not opened the fridge it is probably still OK. However, since it has been 24 hours, I would suggest getting the milk and lunch meat out and putting it on ice. If you have a deep freeze (separate unit not on fridge) the frozen food will stay cold longer.