According to a recent study by the National Institute on Retirement Security, or NIRS, Americans are facing a $14 trillion gap between the amount they have saved for retirement and the amount they should have saved. Since the future reliability of Social Security is uncertain, this is a rather alarming trend.

If you have some catching up to do, the solution is obvious: Save more money. However, I understand that it's easier said than done. There are lots of ways you can save more money, such as dining out less, or avoiding ATM fees; but many people don't realize the impact these can have over the long run.

With that in mind, here are 10 relatively easy ways you could save more money for your retirement that, when combined, could grow into a million-dollar nest egg.