Being a Java programmer and having worked for the top MNC in the world and having been associated with some apps, I have come to understand that just limiting your knowledge to programming will never make your money. May be you might get lucky to some what extent in freelancing. But the true money where you will be paid even when you are not working is apps.
If you have an eye for color schemes and website layout, pick up CSS, HTML, JavaScript, and other programming languages so you can do full-on website development for private clients. If you’ve always wanted to work on apps, learn C++, C#, Objective-C, and HTML5 (among others), depending on the platform or device you’d like to design for (Apple, Windows, Android). SQL, Java, and Python are also great languages to have experience in if you’d like to work in software development in general. Like freelance writing, you can get experience on the job and increase your rates (or salary expectations) as you complete projects or add more practical experience and earned certifications to your skillset.
Learn then selling guidelines. Each marketplace has guidelines that define what you can and cannot sell. State and federal laws also impact what items are prohibited. In general, you cannot sell alcohol, weapons, service contracts, animals or event tickets. Also, while not always prohibited, you may find restrictions on how you can sell items in some categories, such as art, gift cards and coupons.[27] eBay, Craigslist and Amazon publish these guidelines on their websites.
Is there a product or service that you are particularly enthusiastic about? If you are, you may be able to develop a website that is built around selling it. You don’t have to be the actual provider of the product or service either. There are many businesses that offer these products and will allow you to sell them on an affiliate basis. For example, you may be able to sell a product on your website for a commission of 20% or 30% of the sale price.

In most cases I prefer something that is more potentially passive than potentially scalable. Obviously it’s great to have everything, but given the choice I prefer income streams that just work and can be automated so you can do other things. You have to be careful to manage your desire to scale something with your desire to make it passive. Sometimes less is more because less gives you freedom.
Email marketing is alive and well. In fact, a large majority of the most popular websites still generate their income from email marketing by building a relationship with their audience. Things like split testing, effective subject lines and funnel scripts are very important to gain the confidence of your audience while also climbing them up your value ladder. Take the time to learn all that you can about email marketing and start building out your list early on.
First off, I’m a blogger so it seems wrong not to mention it, but more importantly, it’s a legitimate way to make money. It’s quite possibly the least straight-forward way on this list, but it’s very doable and it’s also quite possibly the funnest way on this list. I love blogging and I know hundreds of bloggers who feel the same. So let’s talk about making money blogging and what it really means.
Coding – whether for developing apps or designing websites – is another big business online! It’s a pretty egalitarian business as well, since you can teach yourself to code in many languages and you can code from wherever you are. At its most basic, all you need is a computer (or laptop or tablet), an Internet connection for connecting with project files or far-flung colleagues, and a text editor. (The software involved can get more complicated than that, as you go along.) There are more small businesses wanting customized websites and startups trying to create that next great app every day, and coders can make a living along the way.

Start by taking other courses you’re interested in: Not only is this important competitor and opportunity analysis, but it also gives you an idea of how a course could or should look and feel. What’s the pacing like? Is it via email, video, in-person chats? Once you understand how you want your course to look, it’s time to decide what it should include. Those same courses are a great starting place. How can you make your course better or more interesting? Do you have experience others don’t?

Trading stocks or foreign currency exchange (forex) online isn't something that's for beginners. However, this is a lucrative field as long as you know what you're doing. There are loads of sites that will teach you how to become a proficient trader. My advice? Find a pro or a reputable system or course that you can learn from and tread wisely so that you don't lose your shirt.
If you're looking to address some immediate financial needs, then the app economy is likely right for you. Thanks to the global sharing phenomenon, launched in part by our smartphones and ever-burgeoning global connectivity, you could easily opt for some quick active income by using well-known apps. From ride sharing to deliveries and even quick tasks, there's an app for that today, as the saying goes. 
White labeling products involve purchasing pre-made products from a supplier and then adding your own labeling and branding. Products could range from candles to gym equipment or even tea, but all will come without labels, allowing you to create your own new range of merchandise. Most suppliers will advertise the fact they offer white labeled goods on their websites, so pick your niche and then find the right supplier and product for you. Once labeled, products can be sold via sites like eBay and Amazon, or from your own eCommerce store (discussed in a moment).
Getting businesses to advertise on your podcast, either at the beginning or end or both is a great way to create a revenue through podcasts. Most businesses won’t be keen to advertise on your podcast until you can prove a large number of listeners. Therefore, it is unlikely you will be able to start out from the get-go with sponsors. But once you accumulate regular listeners or a high number of downloads from iTunes, you can start to sell advertising space on your podcasts.
A blog highlights your technical ability and showcases your ability to write blog posts. Your blog can be about different topics than those you write about for your clients. In fact, it should be on a topic that interests you. Visitors will see that you can not only write, but you can also build an online community. A good blog has the potential to earn you many referrals for more clients.[24]
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.
If you have a fondness and talent for taking pictures you can make extra money online by becoming a stock photographer and selling your images to a stock photo company like ShutterStock or iStockPhoto. You’ll get royalties every time someone licenses an image you’ve submitted. To really be successful, build your own photography website to be able to showcase your portfolio and start getting higher-paid private corporate work.
Holly told me she started writing content in 2011. At the time, she still worked a full-time job but created content online part-time to supplement her income. Over time, she was able to double and triple her rates until she could quit her full-time job to write. These days, she makes bank as a freelance writer and teaches others to do the same via her online course, Earn More Writing.
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