Now, I know what you’re thinking. Most of the software and apps you use on a regular basis are made by massive companies or established development studios. Well, yes. But many successful apps, particularly those in the Apple and Google stores, are created and marketed by individuals and small businesses. In fact, independent developers made $20 billion in the App Store in 2016 alone.


To canvass for ideas, we teamed up with Adams Business (a unit of F+W Media), publisher of The Start Your Own Business Bible, released this month. The book contains 501 "new ventures you can launch today," each with its own breakdown---including the startup funding required (as little as $500 in some cases), an overview of the product or service, the typical fee structure, initial equipment needed, hidden costs, operational tips and more---to give budding entrepreneurs an idea of what they're getting into. (Author Richard Walsh was unavailable for comment.)
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.
Upwork: This website offers a great marketplace for selling just about any professional service. You don't need a merchant account, website of your own or anything else for that matter. All you need to do is be able to provide a high-quality service at a reasonable price. But be informed, you will have to compete with many others that are constantly bidding on open jobs. 
If you have a proven track record in a particular field, can prove past success, or have trained in matters of the mind, life coaching or mentorship could be for you. People, especially soon to be entrepreneurs, seek guidance through mentorship and life coaches. You can setup your services from the comforts of your home with no monetary investment.
The terms of an OnDeck Capital loan make it appealing to business owners who need funding for a large project or planned expenditure. Unlike Fundbox, OnDeck offers borrowers terms from three to 36 months, instead of selecting either 12 or 24 weeks. The $500,000 loan limit is the same as LoanBuilder, and the only option that offers a higher loan amount is BlueVine’s invoice factoring facility.

How many email newsletters are you bombarded with every single day? There’s a reason for that. Marketing to an actively interested group of email subscribers is one of the best ways to make money online. There have even been million-dollar businesses built from simple email newsletters like TheSkimm, or Mister Spoils. Each newsletter targets a specific type of user with interesting, daily content, while also partnering with relevant companies and affiliates to bring in extra money. If this seems daunting, it’s not. Tools like MailChimp, ConvertKit, HubSpot and AWeber make it easier than ever to get started with email marketing. And another great option to consider (with the largest free plan available) is SendPulse, with their ability to send up to 15,000 emails per month to 2,500 subscribers, and then affordable plans starting at under $10/month as you grow from there.
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.
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.
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