Got a raise? Congratulations! Before you start spending this windfall, increase your automatic transfer to your savings account to reflect that pay increase. If it's an annual cost-of living increase, you've likely already adjusted to higher prices, and if it's a promotion-related raise, you won't miss the money.
Instead of spending your extra pay, put it towards something that's important to you, like retirement savings or a family vacation. (There are many ways your employer can make your job more pleasant, even when money is tight. Check out Can't Get A Raise? Negotiate Your Benefits.)