Don't put all your trust in Social Security. While it's a good bet that Social Security will continue to work for the next 20 or so years, some data suggest that if Congress doesn't radically alter the system — either by raising taxes or reducing benefits — Social Security won't be available in its current form. It is probable, however, that Congress will act to "fix" Social Security. In any event, Social Security was never designed to be the only resource for retirees in their later years. That makes it all the more important that you save and invest for the future. 
You may be dumb in one field but you can be great in another. A fish always feels dumber watching a monkey climb a tree so easily and knowing that it could not climb. Find a field where you can be good. Everybody is good at something. Bad grades do not necessarily mean that you cannot get rich. Getting rich requires financial and economic knowledge, it doesn't necessarily matter how or what you have studied.
Companies like Uber and Lyft offer a great opportunity to make some quick cash. You'll need a clean driving record, a fairly new car and the authorization to work wherever it is that you live. If you have all of those things, you can work when it's feasible for you, whether that's in the middle of the day during rush hour, or in the wee hours of the night on a weekend. The choice is yours.
Salvage and resell. Do you love antiques or have a knack for finding valuables at flea markets or yard sales? If you do, it might be time to consider salvaging items for resale – or even scouting out antiques to sell for a profit. While you’ll need to spend quite a bit of time searching for prospects and spend some money buying upfront, you could easily turn a profit if you know what you’re doing.
Wealth: nearly everyone wants it, but few people actually know what they need to do in order to get it. Becoming rich takes a combination of luck, skill, and patience. To get rich, you'll need to set yourself on a path that leads to a monetarily enriching career, then handle the money you earn wisely by investing it, saving it, and reducing your living expenses. Getting rich isn't easy, but with a little bit of perseverance and skillful decision making, it's definitely possible.
Open an Etsy store. If you have a creative talent or skill – whether it’s creating art, sewing clothes, or making keepsakes – you can open an online store on Etsy.com and sell your wares for some quick cash. With your own Etsy store, you’re left in charge of pricing and, ultimately, how much you make. See our detailed primer, “How to Make Money on Etsy.”