Amazon makes it fairly easy to list and sell old books, games and devices on its marketplace. You can make more than just a few bucks If you have pricey textbooks from college. Be sure the books are in good condition. You'll get negative reviews if you attempt to sell books that are falling apart or games that are scratched up. Remember, be upfront about any defects, no matter how small they might be and no matter how few people might readily notice it. 
Overall good ideas, but we need to define the idea of ‘fast 100 bucks. Swagbucks is pretty slow as an income resource and it would take a while, not to mention selling stock photos is not something you do in 2 days. I tried this 4 years ago with my close to pro’ photos and it took days to set up a small portfolio there with some outstanding work and yet made no sells.
During my high school days, I was a pretty decent golfer (about a 2-3 handicap, for you other golfers out there). I was asked by my local club professional if I would help him teach his junior golf clinics that summer. If you have specialized skill in any sport, there are definitely opportunities out there for teaching others the fundamentals (and getting paid).
I personally have enjoyed working a direct sales/home based business on the side. I found a good, legitimate company with very low upfront costs/overhead. It has been a great experience. Just be sure that the company offers training and some sort of simple, step-by-step system and it helps if they are in the DSA Top 100– instantly proves their legitimacy!
To get started, create a listing by filling out a description, take and upload photos of your space, and set a price. Your listing helps guests get a sense of what your place is like. Then, set the dates the space will be available and draft your house rules. Once your listing is live, guests can book their stay at your home, and you start earning money.
Need more ideas on how to make money online? Another strategy is using webinars to market your product, service, or course. I’ve done webinars to promote my financial planning practice and to drum up interest in my online course for financial advisors. With a webinar, you’re basically offering a lot of tips and advice for free — usually in a live format. At the end though, you pitch your paid product or service with the goal of securing a few deals.
Get-rich-quick schemes and fad weight-loss diets are naturally popular because they satisfy the id while also attending to the super-ego. The ego's job is complete when it sees something like this. The appeal of "fast'' stems from the innate desire for instant gratification, so beware of what seems too good to be true (they often are) when you're looking to make money quickly. Be wary. Listen to the conversation deep within the confines of your mind and do your best to tame the proverbial beasts.
Try night filling for supermarkets/large stores, supermarket/retail cashiers, vacation seasonal factory work/seasonal fruit picking, night reception in a small hotel, cleaning, gas station attendant, making crafts or artwork and selling online, YouTube video making (but it needs to be popular), dog walking, babysitting, tutoring, housesitting, etc. There are many part-time options where college students are favored because people get to pay you less than a service provider but get to know you better, so it's a friendlier arrangement.
If you’ve got some free time and don’t live in the middle of nowhere, becoming a Lyft driver can be a very lucrative side hustle. And right now, they’ve got a promotion going on where any new driver can earn up to a $1,000 bonus after completing their 125th ride. If you start now and hustle hard on the weekends, you can probably unlock that bonus within a few weeks of driving (the bonus is cleared on top of your normal earnings).
 @Philip Taylor So by what you’re saying, I can be an unaccredited doctor or surgeon for someone (for example) but do it at a much lower rate than the accredited doctors and surgeons. Since I know what a scalpel is and I wear rubber gloves, I’m a doctor. So, I don’t have to have to respect the profession of medical science at all since I think I know what I’m doing and just go for it.
29. Videos – This could be an entire section on it’s own. Many people have made money by creating YouTube videos. Evan of EvanTube is a kid and he has made millions by creating reviews of products that other kids his age would use. It’s not easy to get views into the millions, but once you do, you’ll start seeing some cash come in. Many bloggers have completely turned to videos to get their point across by starting a video blog.
The stuff you can’t sell online, you could sell from your garage on the weekends. Many neighborhoods plan annual or bi-annual yard sales. If you have items to sell, this is a great time to do it as the neighborhood as a whole can bring in a lot of traffic and help you perform better than you would on your own. If that’s not possible, consider partnering up with a couple of families in a popular neighborhood.
If you wish you had a little more money in your pocket, you’re not alone. Fortunately, you have a variety of options when it comes to making money. Doing odd jobs is a quick and easy way to earn money. Similarly, reselling items or selling items you make can earn you extra cash. As another option, earn money online by writing a blog, freelancing, or doing online surveys.
It’s also a good time to take advantage of the gig economy. Can you play an instrument, repair clocks, tutor someone in math, plan a party, paint signs, repair decks, or write calligraphy? Think far and wide about what you’re good at, and write an ad for yourself. Chances are, someone out there needs your expertise, no matter how small or inconsequential you consider your talents to be.
Set up an account on Rover.com. Enjoy furry company once in a while? These days, many professional pet-sitters set up an account on Rover.com. With Rover.com, you can reach people in your area who are actively looking for someone to watch their dogs, cats, hamsters, or turtles, either in their home or your own. You can set your own rules and schedule and come up with your own pricing through the Rover.com pet-sitting platform.
Most of us are guilty of hanging onto things that we never use, myself included. Take a day and go through all your old stuff and get rid of some of it! One tool that is really helpful for this is Decluttr. You can enter the number on your item’s barcode [into their valuation engine] and they’ll give you an instant offer. Then you simply pack all your items into a box and ship them off for free.

@moxie1956 Thanks for sharing your experience with CashCrate.com. That’s certainly disappointing to hear that you weren’t able to make the $50-$75 a month that I expect. Maybe they are just going through a seasonal downturn or something. Like I mention above though, the real money with Cash Crate comes in the referrals. Find a way to consistently refer a large amount of people to the site.
Become a proofreader. All kinds of businesses hire professional proofreaders to look over their copy and content for errors before they publish. This side hustle is one that could work for nearly anyone since you can work from home provided you have a computer and an internet connection. You can find online proofreading jobs through websites like Indeed.com and FlexJobs.com
Using the money you already have to make more money is usually a pretty smart move. A service like Lending Club is a great way to act as a lender and earn interest on your money. Lending Club is the world’s largest online credit marketplace connecting borrowers and investors. Essentially you act in place of the bank, and lend out money at predetermined interest rates (that are typically higher than your average savings account).
Worth noting is that Postmates doesn’t even require that you deliver by vehicle — a bike will do.  Better yet, there are no startup fees or time commitments with Postmates and all you’ll have to do is pass a basic background check to get started. Once Postmates verifies your identity, they’ll send you a delivery bag and a prepaid card (in the mail) that you’ll use to purchase delivery items.
If you’re trying to figure out how to make extra money (and really, who isn’t?), it can be hard to know what’s a legit way to score some extra cash and what’s just a total waste of your time. We’ve done the searching for you and found 30 ways to make extra money—everything from wrapping your car with a banner advertisement to renting out the baby equipment collecting dust in your attic.
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