If you have a knack for a certain subject and live near a college, consider offering up your brain power and teaching skills for some quick cash. Grade school kids need help too, and parents pay better than college students. You can take this idea to the next level and scale by tutoring online. We have an interview post dedicated to a chemistry tutor who took his skills to Tutor.com.  To be successful, you have to have a good grasp of the concepts but also be able to find a way to relate topics using real-world examples.
Robo-advisors are diversified investment accounts that are automatically managed by a computer algorithm (as opposed to a human money manager). If you want to invest, but don’t have the money, or don’t want to invest with a money manager, robo-advisors are for you! Robo-advisors make investing easier—and cheaper—so they’re perfect for new investors.