Life is expensive. From rent to college loan debt to shiny technical equipment that demands your money, it can be hard to build a sizeable nest egg. However, if you have an Alexa device, Amazon's voice assistant supports a number of capabilities that can help you save money from Credit Card Helper to The Motley Fool. Talk to her on your Alexa-enabled device, the Amazon Shopping app, or the Alexa app. That's how it's done.