Buy underpriced used books. Outfit a phone with an ISBN reading app, scan the ISBN numbers of books at used bookstores and thrift shops, and compare the asking prices with what the books are selling for on a site like Amazon. Whenever you get a good hit (which won’t be often but, since the process is fast, won’t take long, either), buy the book and resell it online. Be discreet about this, as the store managers probably won’t like what you’re doing.
Start analyzing your decisions from the perspective of a firm. In economics, a firm's goal is simply to maximize profit. Well-run firms spend money only if they can expect to make more money from their investment, and they allocate their resources to the most profitable use. You're not a firm, of course, and you have other considerations, but if you make the majority of your time and money decisions by choosing the options that promise the highest return on investment, you'll likely earn more money, and that's good news for your shareholders (you and your family).
Parlay your math, science, foreign-language or test-prep expertise into a lucrative side gig by becoming a private tutor. You can tutor people online or in-person. What you charge can depend on your experience, expertise and what’s in demand. To get started, see what types of tutors are needed on Craigslist, or create a profile on sites like Tutor.com or Care.com. You can also advertise your services at local schools and community centers.
You can also make money fast by investing in stocks. If you aren’t an expert in stock picking you might want to skip this money making idea. While it can have one of the highest fast rewards, it can also result in money loss if you’re inexperienced. If you currently hold a 9 to 5 job, look into your company’s financial programs. Do they allow you to invest in company stocks? If so, sign up for it. At least with a company stock program you have some influence in the company’s success as an employee. If your company has an RRSP matching program, you can also sign up for that if your goal is to save up for retirement or a down payment on your first home.
Rover is a dog walking and pet sitting website that is always looking for qualified dog walkers in cities all over the United States. So when you take your pup on a walk, you can also take a second (or third) dog with you and get paid to walk. 30-minute walks fall in the $10-30 range. With a neighborhood route, that can add up quickly! You’re just a short application away from getting started.