How do you turn main dish leftovers into a 'new' dish for the next day? :)

You can take a look at this website, there are a lot of suggestions on how to use leftovers: http://greatist.com/health/leftovers-meals-healthy-recipes Personally, I've usually use leftover rice to make fried rice. For some reason, fried rice tastes nicer when leftover/overnight rice was used as compared to freshly cooked ones. ;p