Compound interest can help turbocharge your savings and investments, or it can quickly lead to an unruly balance, keeping you stuck in a cycle of debt. Its magic can help you earn more — or owe more.

Daniel Liberto is a journalist with over 10 years of experience working with publications such as the Financial Times, The Independent, and Investors Chronicle. VioletaStoimenova / Getty Images ...

January is traditionally a month for starting projects, trying new things, and working to break bad habits — particularly anything that gets in the way of self-improvement or productivity. Polygon ...