Driving for one of the two globally expanding app-centric taxi alternative services, Uber or Lyft can still be a fairly lucrative way to earn money as a side business idea on nights and weekends—working only when you want. But before you dive head first into this side business idea, do your homework and calculate the costs of extra gas, mileage, tires, wear & tear and usage on your vehicle—it's not a guaranteed business idea that'll turn a huge profit every weekend.

If you speak like James Earl Jones or Scarlett Johansson, quite a number of digital publishers (including game developers, animated film-makers, and training video producers) pay good money for voice talent and the time investment isn't too intensive—making this a great side business idea. You can find these publishers looking for voice-over artists on sites like PeoplePerHour, Freelancer and Upwork, as well as their calls for talent directly on their websites or through voiceover agents. If you do pursue this as a side business idea, be prepared to invest for the long-haul as it can be a very competitive industry.
Having an adequate amount of cash flow in a business can make the difference between success and failure. That’s why it’s important to have serious cash reserves when you launch full-time. But many people don’t have the months of operating expenses needed to do this. So they start small with a side business and use profits to beef up cash reserves for a future full-scale launch.
“There's a great temptation to assume that side hustles are just for "special people," like artists, dreamers, and 17-year-old computer geniuses. But Guillebeau deftly proves everyone can (and should) have a side hustle. More than that, he shows you how. He is living proof that this book works, and so are the many people who have followed his roadmap.”-  Jon Acuff, New York Times Bestselling Author of Finish 
43 Translating If you are fluent in a second language, translation services are in demand as UK companies look overseas for new sales. But be warned: it's a serious business and you'll need professional qualifications from an accredited body (such as the Institute of Translation and Interpreting or the Chartered Institute of Linguists) and professional indemnity insurance before setting up.
Have some extra space in your home? Turn that extra bedroom into a “bed and breakfast” room. If you live near any sort of tourist destination, you can try your hand at renting out a room through Airbnb or CouchSurfing.com. You may also find paid hosting opportunities in your community: Sign up to host exchange students, visiting professors to a nearby college, or hospital patients receiving long-term treatment.

When it comes to online businesses, a good website design is one of the defining factors for success. A bit like web development, it is one of the most in-demand skills in the freelance world. With new startups launching every day, finding web design work won’t be very difficult. But you can also explore the possibility of designing and selling WordPress themes or creating custom designs for Squarespace and Wix users, like Designs for Squares are doing.
Another flexible non-phone option in the educational field is test scoring. There are a few reputable companies that do hire home-based workers to score everything from standardized tests to essays. Before you apply, you should know that ETS and Pearson (listed below) do require that you have certain qualifications and/or past teaching experience before they'll let you become a scorer. WriteScore on the other hand requires just a two-year college degree.

It’s not on this list but Brand Ambassador/Promo work is another very flexible, fun, and lucrative side hustle! Basically you promote your favorite brands at awesome events (e.g. handing out Red Bull or demoing new products at high foot traffic areas). I created an entire resource website on how to succeed in this industry called “Brand Ambassador World”. It has everything from resume designs, to super helpful tips and tricks, to where to find promo gigs, to a comprehensive list of agencies, etc.

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