Sell CDs and/or DVDs. Back up your collection on a computer or external hard drive, then sell the original discs. You’ll make quick cash and save space at the same time. If you have prized collections (boxed sets, limited-release editions, etc.), sell these individually for what they’re worth; otherwise, sell your discs very reasonably (remember, your potential buyers can also get the exact songs they want instantly by downloading them for buck or less apiece). Even for a mere $4 each, a sizeable collection of CDs can haul in a tidy – sum.
Believe it or not, there's an actual business, Profile Helper (profilehelper.com), that interviews clueless daters and charges them $50--$100 to revamp their dating profiles. Clever up your Facebook page to advertise your profile prowess; post info about your service on OKCupid (okcupid.com) and Craigslist. Charge $30 a pop and tell your successful clients to pass the word along. For more money, offer to snap flattering photos.
Know the difference between an asset and a liability. The dividing line is whether it puts money in your pocket, or takes it out. As much as you love your home, for instance, it is a liability rather than an asset because you put more money into it than you get out of it (unless you're flipping it or renting it out). Whatever money you save, invest it in assets such as stocks, mutual funds, patents, copyrighted works--anything that generates interest or royalties. Eventually, you might get to the point where your assets are doing the work for you, and all you have to do is sit there and make money!
If you have graphic design skills then you could make money online by creating and selling your own design elements, like templates, fonts, graphics, and other assets. This is a great way to earn extra money and build up a portfolio of work, which could lead to you picking up freelance graphic design jobs. Websites like Envato Elements pay you a fee per element sold, which can become quite profitable if your work is popular.