If you’re willing to take on some risk and have the heart of a true hustler, you can make extra money online doing commission-only sales for startups and other businesses. While you won’t be getting a regular salary, with the right sales strategies and skills as an inside sales rep, you can make decent money for each sale you bring in. And because you’ll most likely be working with startups, if you can negotiate a little equity you could profit big time if you're pitching a solid product and the startup succeeds.
Sell photos. If you have a decent camera and a good sense of light, color, and composition, you can take and sell stock photos – i.e. nondescript images that lend themselves to many applications and are commonly used to illustrate online articles or products – with minimal effort. Stock photos of locations (a fire hydrant, a bare wall near an interesting tree, or anything you might find as a default background image on your computer) are easier to take, but stock photos of people (i.e. people arguing, people kissing, people laughing) usually sell for more, as they have more uses and require the written legal consent of your subjects. Hunt for a reputable stock photo dealer or database that will pay you fairly before signing on with anyone.
Don't sacrifice morals for a quick buck — At the outset, you'll want to do all sorts of things to make money online, but don't sacrifice your morals for a quick buck. Not only will you put people off, but you'll lose Google's trust. You also shouldn't concern yourself with things like Adsense or other ads on a blog before you have around 100,000 visitors per day. Yes, per day. 
If you live near a university, there are likely all sorts of research studies looking for participants. While I was an undergrad at Virginia Tech, I got paid $500 to participate in a 6-week dietary study. The study provided all my meals and paid me, but I had to eat a 5,000 calorie diet of 50% fat for 6 weeks, plus I had multiple muscle biopsies, urine/blood testing, etc.
Find a profitable niche: We’ve talked about this a lot. But, where are you most comfortable. What niche do your skills, values, and interests intersect? Do you have 10 years of experience as a technical writer? Do you have long-standing PR relationships that’ll be invaluable in helping startups launch a successful crowdfunding campaign? Determine what makes your value unique, and lean heavily on showcasing that strength to your potential clients.
Using Fiverr is a great way to pick up work. Once you have signed up you can advertise your services. Fiver allows you to create your own gigs, whether you are offering web design, digital marketing, writing, or something else. You can choose how much you want to charge (it can be more than a fiver) and people will then contact you if they are interested in working with you. Fiverr will not only help you get experience if you are just starting off as a freelancer, but it will also help you earn some extra cash.
For example, if you register for free with Textbroker.com and submit a writing sample, you’ll receive a rating based on your content quality. Then you can choose which projects you want based on your quality rating and earn 0.7 cent to 5 cents per word, or more. FreelanceWriting.com provides a long list of freelance writing opportunities culled from several top sites. Many of the recent listings offered hourly rates of $25 or more. For $21 a month, you can join Mediabistro’s freelance marketplace to post your qualifications for review by media managers seeking writers.
This isn’t to scare you off. I simply want you to know that this guide is going to focus solely on ways to make real, sustainable extra income online. Not just a few bucks. I want to share all the mistakes I've made that got me to where I am now so that you don’t have to go through them, and can build a successful online source of income for yourself.
Sell photos. If you have a decent camera and a good sense of light, color, and composition, you can take and sell stock photos – i.e. nondescript images that lend themselves to many applications and are commonly used to illustrate online articles or products – with minimal effort. Stock photos of locations (a fire hydrant, a bare wall near an interesting tree, or anything you might find as a default background image on your computer) are easier to take, but stock photos of people (i.e. people arguing, people kissing, people laughing) usually sell for more, as they have more uses and require the written legal consent of your subjects. Hunt for a reputable stock photo dealer or database that will pay you fairly before signing on with anyone.
Sell baked goods. Working parents might not have the time to whip up a birthday cake or cupcakes for school parties. That’s where you come in if you can create tasty baked goods. A friend of mine who is a single mom started making cupcakes as a way to keep herself occupied while staying with her dad when he was undergoing chemotherapy. She posted a picture of her cupcakes on Facebook and instantly received several orders from friends. Now she makes about $200 a month making cupcakes for others who hear about her through word of mouth or see pictures of her cupcakes on her Facebook page.

You can earn above average rates of return because peer-to-peer lending eliminates the bank function. That means that you participate in nearly the entire interest rate being paid by the borrower, rather than the less than 1% that you will typically earn on certificates of deposit. And you can reduce your risk by investing in slices of hundreds of different loans.
You’ll almost certainly need at least an undergraduate degree to qualify for many online teaching jobs for K-12 online schools, universities, and other virtual education organizations. Often, employers prefer some experience in teaching students online. For jobs at the college level or higher, a post-graduate degree is a common requirement, along with professional experience in the pertinent subject area. Requirements can vary for tutors; for example English as a Second Language or ESL certification may be required to teach English to people who speak other languages, though you may not need to be bilingual.
Every year, hundreds of millions of documents are notarized in the United States: wills, mortgages, citizenship forms, handgun applications. While for decades, this has all been done in person, there is a budding crop of sites that allow notaries to take their services online. If you’re already a notary, you can sell your services online. Or, if you want to get started, check out the National Notary’s checklist for becoming a certified notary.
There are few ways to make money while you shop. You can pick up short tasks that involve shopping, like doing price checks or photographing in stores or you can go mystery shopping. Mystery shopping is definitely a real way to make money but you have to be careful because the jobs can be the bait for scams, so you have to know the signs of mystery shopping scams. But there are legitimate companies that hire mystery shoppers. 
Are you a highly organized multitasker who’s good at meeting deadlines? Working as a virtual assistant may be a good way to put those skills to use to help you make money from home. You may be asked to use administrative skills to assist an executive or a team with managing schedules, travel, phone calls, email, and records and accounting maintenance. You’ll need top-notch communications skills to work in this fast-growing field, and related past experience as a virtual assistant helps.
What’s the catch? None, really. Cash back apps act as affiliates for many online merchants, which means that whenever you make a purchase through one of the apps, they get a small commission — but then, they give you a portion of that commission as “cash back”. For example, if I buy a pair of Nike shoes through the Ebates app (or website) and spend $75, Ebates may get a $10 commission but then they’ll pass $7 back to me. It’s basically a way to get sale prices on stuff that isn’t on sale!
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