That said, lot’s of people are making extra money by publishing their own books on Amazon.  For instance, my friend Bob published a few books on Amazon on how to make money blogging and has done very well.  The first book provided basic tips for a small price, but his next book, Pro-Blogging Secrets, is offered at a premium price and he also has an online course.
 @Philip Taylor I was merely using medical science as an example profession. It’s quite obvious that you don’t have any professional courtesy and downplay professions in which you don’t understand. Logo design isn’t just logo design. I don’t know what the profession of a public accountant entails, or a lawyer perhaps, so I’m not going to give advice on matters that I don’t especially have knowledge in.
There is no job too small when it comes to earning to save more or pay off debt and a paper route is about as basic of an extra money job as you can get. Yep, people are still buying newspapers these days. Nothing like a nice clean, crisp paper with a good cup of coffee to start your day. This job will likely take up your early morning hours. You can also search for a paper that only comes out once a week if you want to work less. The bottom line is that a paper route is still a valid way to make extra money and I’d be remiss to leave it off this list.
There are many ways to get people onto your list. Lead magnets are one such resource. For example, you can build ebooks, checklists and cheat sheets. But you can also do content upgrades, such as PDF versions of an article with added resources in them, four-part video training series, and more. Think about your audience and what you can offer them to better serve them, then treat them with some respect and you'll eventually reap the rewards.
Etsy: While Etsy's popularity has declined recently, it's still a great resource for selling handmade items online. No need for complex ecommerce sites or merchant accounts or any sort of automation. The company takes a commission of every sale and charges a small listing fee per item. But many still use Etsy as their primary source of income. The best part is that you can also sell digital products on here such as poster designs. 
Waiting tables and bartending are good ways to make extra money, but it’s not exactly if the work was easy. And if you don’t have any experience good luck applying at the nicest place in town, most restaurants require experience. Also if you have problems dealing with demanding, hungry people – STAY AWAY! The hours are late, sometimes you won’t make any money. Especially right now, starting at new place will be difficult, if you can get hired expect to be the first one cut every night (aka less money) as those with seniority will want to stay. It still is a good deal though. I’ve put myself through college (chem major) without loans, never lived in the dorms, and I have about 10K in the bank. I will continue working in the restaurant biz even after I have a “Real Job,” the extra 10-15K/year for part time work is worth it.
Buy bottled water in bulk at Costco or Sam’s Club and sell it for a dollar where there are a ton of people: parks, festivals, concerts, etc. People are crazy for bottled water and this is a little summertime gig that can bring in more money than you’d think on a hot sunny afternoon. Here’s a bonus tip: give some of your proceeds to a charity you care about or that you know will resonate with people. In doing so, you’re bottled water business isn’t all about your profit. You’re helping better our world and also provide a thirsty person some water to drink.
Try flipping houses if you have experience with making home repairs. As you may know from watching popular home improvement shows, flipping homes involves buying up a lower valued property that needs work, and then fixing it up for resell. To get started, you’ll need to have financing either through a bank a partner. Then, you can buy a property that’s priced below market value. After you renovate the property, you may be able to sell it for a profit.[10]
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