Tackling money goals one at a time cost financial literacy expert Barbara O’Neill at least $1 million.

That’s how much O’Neill, a distinguished professor at Rutgers University, figures she lost by starting saving for retirement only after she had created an emergency fund, bought a car with cash and purchased a home.

“I tell students that eventually, 30 years later, I hit the million-dollar mark, but I could’ve had $2 million,” O’Neill says.

Too often, financial experts say, people want to attack their money goals one at a time: “As soon as I pay off my credit card debt, then I’ll start saving for a home,” or, “As soon as I pay off my student loan debt, then I’ll start saving for retirement.”

These folks don’t realize how costly the words “as soon as” can be. In my latest for the Associated Press, paying off debt is a worthy goal, but it shouldn’t come at the expense of other goals, particularly saving for retirement.