Get Rich Slowly has a great post listing 10 Common Money Mistakes. The one that captured by attention:
Not saving enough. Glink writes: “Building wealth isn’t about how much money you earn each year; it’s about how much money you don’t spend.” When you’re just starting out, it’s difficult to find money to save. But even a little is better than nothing. Work to build an emergency fund. If you have the surplus, by all means max out your retirement plans!