Donating plasma can actually work out better than selling your blood.  It takes longer to donate plasma because they will put your red blood cells back in your system. The upside is that you can donate plasma as much as twice a week and you can make anywhere from $40-$60 per donation. You can make that $100 in less than a week if you can stomach the needle.
Invest. There are no guarantees when it comes to investing, but you should always start sooner rather than later. If you are looking for a good investing platform, I recommend Motif. Motif Investing allows individuals to invest affordably. This approachable investing platform makes it easy to buy a portfolio of up to 30 stocks, bonds or ETFs for just $9.95 total commission.

You're in New York, for crap's sake. All you need is a stakeout near the Waverly Inn, a writing surface (no, not your ass—try head shots) and a great puppy-dog face. A signed Madge LP album cover can sell for $25--$1,200, Donald Trump's John Hancock can fetch about $150, and all four cast members of Sex and the City (like we'll ever see them all together again) can get about $100 on eBay and from autograph dealers. For a database of registered dealers, visit the Universal Autograph Collectors Club's website (uacc.org).
What, specifically, can you sell on Fiverr? Anything from graphics and design services, to digital marketing, writing and translation services, video and animation services, music and audio, programming and application development, business services and lifestyle services that includes anything from celebrity impressions, to gaming and even astrology readings. 
If you have an extra room in your house, consider listing it on Airbnb. Airbnb is a new way to travel for many people around the world. Instead of booking through expensive hotels, why not stay at someone's house? As a guest, you can choose high end to low end, choose to stay with other people or opt for privacy. As a host, it's a great way to make side money, utilize unused space, and meet new people! How much you can earn depends on your area so I recommend finding out by becoming an Airbnb host yourself!
The prep work before you open up shop is more time-consuming. You need merchandise to sell, photos and descriptions to post, a name for your shop and a business plan to help you succeed. Once that’s done, you’ll still need to find customers. Depending on what you’re selling, that could take weeks, which is why you should expect the overall time for this gig to be slow.
Blogging is also one of the cheapest ways to make money online, aside from the time and and intellectual input that you have to invest. As you begin to make money from your blogging efforts, you can easily outsource for greater scalability. I also use Bluehost and I like the fact that it seamlessly integrates or interfaces with WordPress. You can set-up a domain or subdomain in minutes and start blogging in seconds. I love it!

Work remotely for a call center. Because many call center jobs are location independent, finding work in this field is an easy way to earn some money from home. Dozens of sites list job openings for call-center representatives, including Freelancer.com and SimplyHired.com. Meanwhile, you should check local job listings for openings and opportunities as well.
Channel your inner minimalist and get rid of all those dusty DVDs or CDs on your entertainment stand or in boxes under your bed. And make the whole process easier with Decluttr. You can scan the bar codes of items you don’t want anymore and see how much money the company will give you. Instead of waiting around for a buyer to maybe purchase your item, the company itself will buy your items outright. See ya later, Godzilla DVD. 

Buy and sell domain names. If you’re good at finding popular yet undiscovered domain names, you can make some cash on the side by buying and reselling websites. Think of it as digital real estate speculation. Domains are available on GoDaddy.com for as little as $2.99 per year, but are sometimes resold at far higher prices: According to Business Insider, the site MM.com sold for $1.2 million dollars in 2014. Once you find the perfect domain name to resell, you can market it on Flippa.com for a flat fee.
If you have a college degree and the skills to tutor students online in math, science, English or social studies, this job may fit you perfectly. Go toTutor.com—tutors who work for the company and have passed their probationary period earn $10 to $14 an hour. According to Durst, "Skype and other web interface tools are bringing English language instructors face-to-face with students from around the world." Tryispeakuspeak.com,openenglish.com to get started.
WeReward: This iPhone and Android app allows you to complete small tasks (ex. taking a photo of yourself with your favorite beverage or eating at a new establishment) for points that translate to cash. Though the per-task reward is small, there are millions of participating businesses and the points can add up quickly. The location-based rewards are best if you already have an active lifestyle and won’t have to force yourself to starting eating/drinking out all the time.
But cutting costs only goes so far. Unless you already make a lot of money and spend like a bon vivant, most people can’t eke out that much more from their budget by decreasing expenses. Plus, the more you retrench, the more your quality of life suffers. (It’s all relative, though — certainly some overspenders could actually improve their lives by tempering their expenditures. Here are 101 ideas for saving money.)
Really good article with some great tips. Affiliate marketing has the potential to earn lots of money and I'm hoping I can make it happen. I have tried the matched betting and it DEFINITELY works. The one thing I would say is that you need to check that any bets have been accepted by the bookmaker. I have had on occasion bets which look like they have been accepted but don't register in my account. Always go into your account and check outstanding bets or your bet history.
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