Cheap business cards are your best allies for your networking business that will help you build your client base. If you know a thing or two about paid internet marketing and are comfortable with Google, a great way to make some extra income as a side business idea is to sign a freelance contract to manage a company’s Google Ad Campaigns , and gradually start bringing on more clients as your consulting business grows.

Whether you’re an expert marketer, business strategist, or manufacturing aficionado, there’s likely a local business owner who’s willing to pay you to help them solve an issue with their company—if you can craft an effective cold email that convinces them to hire you.

Aside from the fact that you will have to invest little to no money to get started, it is far less time consuming than the average 9 to 5. Once you have created your application, couple it with the right marketing strategy and you’ll be making money in your sleep The best part about developing applications is that you can do it from anywhere in the world.

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Even if you don’t have a background in online marketing, you can take a cheap online course to get started – particularly with is another competitive industry, so if you want to stand out, focus on a niche area, such as AdWords, or emerging marketing fields like influencer marketing.