Take surveys. You can earn $50 to $100 per month in cash and products by taking online surveys. Find survey sites by searching for “paid survey sites” online. Sign up for several survey sites to increase your chances of being selected for higher-paying surveys. Register with an email address, and check your email often so you can respond quickly to survey offers.
Register your business with the Vets First Verification Program to be eligible for special opportunities to do business with the government. Small businesses that are owned and controlled by veterans and service-disabled veterans, and verified through the program, may also be given priority when competing for federal contracts. Learn how to apply, and find out which documents you will need to submit. You can also find VA-certified business counselors in your state for free help.
Join a startup accelerator: Another great option is to apply to a startup accelerator like Y Combinator, 500 startups, or TechStars, where a group of investors will help coach you, connect you with potential partners, and provide startup cash in return for a small stake in your company. The competition is tough to get into these, so don’t rely on them as your only path forward.
Find a profitable niche. Starting with your interests, write down as many niche ideas as you can. Think about topics people might search online. Ideas include passions (like surfing or body building), fears (like spiders or speaking in front of crowds) and problems (like getting out of debt). Do keyword research to see it others are interested in the topic. Find out if a domain name is available that matches the keyword 100 percent. 
If you have a propensity for writing and you can slay with your prose, consider writing an ebook. While the market has certainly become saturated as of late, books that help teach people about a technical topic still sell extremely well. This is a great source of passive income but does require a large amount of effort at the outset before any money is generated.
Tasks like naming the business and creating a logo are obvious, but what about the less-heralded, equally important steps? Whether it's determining your business structure or crafting a detailed marketing strategy, the workload can quickly pile up. Rather than spinning your wheels and guessing at where to start, follow this 10-step checklist to transform your business from a lightbulb above your head to a real entity.
17. Amazon – Have you heard of FBA? It stands for “Fulfilled by Amazon” and it’s getting pretty popular. Basically, you buy products (in bulk is best) and ship them to Amazon for them to store. When your products sell, Amazon packs them up, ships them out and sends you the money (after taking their cut). There are people making a full-time living from FBA, while others just do it for some extra money.
Often, what happens is that we run into unscrupulous Internet Marketers (IMs) who have less-than altruistic intentions of extracting money from you rather than helping you to make it. However, this isn't something new. People have been falling for networking marketing, pyramid schemes, and affiliate marketing scams since before the start of the net.
How can you make a living as a real social-media expert? Practice. Build an audience for yourself before offering your services to others. Determine your target sector, build your own online presence in that community and start making contact with the social-media elite. Twitter is a great place to start. Keep cranking out content and getting it to the right users, and you’ll find a way to get yourself hired even in an ever-expanding universe.
And while it will take time to build up a big-enough audience to attract advertisers and other ways to make extra income from your podcast, the opportunity is there. John Lee Dumas interviews entrepreneurs seven days a week for his podcast Entrepreneur on Fire and now makes more than $200,000 a month from it. In fact, John publishes all his income online and showed that he’s made almost $13 million since launching in 2012.
"Too often, new entrepreneurs are so excited about their business and so sure everyone everywhere will be a customer that they give very little, if any, time to show the plan on leaving the business," said Josh Tolley CEO of both Tribal Holdings and Kavana. "When you board an airplane, what is the first thing they show you? How to get off of it. When you go to a movie, what do they point out before the feature begins to play? Where the exits are. Your first week of kindergarten, they line up all the kids and teach them fire drills to exit the building. Too many times I have witnessed business leaders that don't have three or four pre-determined exit routes. This has led to lower company value and even destroyed family relationships."
People are turning to audio and visuals when it comes to technical subjects. However, you should consider doing an ebook first and turning it into an audiobook through a resource like Audible's ACX platform. You can hire a producer either through a royalty share program, so you don't have to shell out upfront cash, or you can do a pay-per-hour hire as well.
The second (and cheaper) path assumes that you have the design and dev chops yourself to build your dream software. Naturally, it’ll take more time to get your product off the ground, but being able to bootstrap the development of your software lets you retain more ownership in your business and be more in control of your path, making this a lower-cost, but higher time investment to make money selling apps.
I have another to add to your list that’s almost as easy to do as going for a daily walk! Clean up litter outside commercial properties for property management companies. The work is done on foot using simple hand tools. I started this as a side gig in 1981 and grew it into a profitable full-time business that I continue to operate today. I share my experience in my book, Cleanlots, and offer free support.
18. CraigsList – Some things don’t ship very well. Other things may make you feel uncomfortable to sell to someone across the country. Anytime you’re selling a large item or something you just don’t want to ship, Craigslist is a great place to go. It’s simple to list your item (again, take good pictures!). If you don’t like the idea of putting your phone number out there, the interested individual can send you a message to your inbox without even getting your email address.