Most of us could use a little help saving money. A simple trick that might just help...

Do you have any $2 bills in your wallet? 

You might want to start carrying those around. Although they’re not really all that rare, people tend to think they are. In a recent experiment, those who had $2 bills were less likely to let go of them, or at least save them for a special occasion.

If you’re giving a gift of money, consider less common currency like the $2, $50 or $100 bills and the recipient will likely hold onto them for a little longer. Most people think twice before breaking a large or unusual bill or coin.