You will probably start thinking about all of the great ways you can spend the money or what debts to pay off, and while it is great to think about how to put the money to use, you need to begin planning ahead. There is no right or wrong answer, but the worst thing you can do is furiously squander the money away.
Consider reducing the high-interest debt you carry first, and then think about investing some money for the future. Reducing the debt will save money in unnecessary interest, and saving money will ensure that it lasts. It's fine to treat yourself and enjoy some of the money, but you don’t want to sacrifice your long-term financial goals for a few guilty pleasures.