For example, if you were an Amazon affiliate and linked to some of your favorite books with affiliate links, if someone clicked on a link and purchased that book, you’d get a small commission. Even cooler is that some affiliates have 30-day cookies, meaning that if someone didn’t buy right then but bought 20 days later (and bought other stuff too), you get a commission for all of that. While most affiliates pay per sale, some pay per lead as well.
I occasionally use a MasterCard or American Express card on small purchases just to keep those accounts active. Also, I have been to the odd retailer that accepted only a certain type of credit card, so I find that having one from each major company is quite handy. Aside from my main Visa card which earns the airline points, the rest of my cards are of the “no annual fees” variety.
Write academic papers. There are lots of people, from middle school students to people working on their doctorate, who have more work than they can handle. You can get paid to do it for them! Writing other people's school papers can be a great way to make money if you're a good writer and willing to learn lots of different subjects. There are many companies that provide this service for which you can work if this is what you want to do.
Of course, the number one thing you want to look at is the commission rate. What percentage of the customer’s payment will you receive? In some cases, there is a flat fee for every sale made, and sometimes you will get a percentage of the total sale. Keep your eye out for "percentage of commission" sales, as this means that you're not taking a percentage of the total sale, but rather a percentage of the company's commission.
Tools & Resources: I’ve written a pretty comprehensive guide on the best web design software that covers both free and premium software packages. If you’re serious about becoming a web designer, then I recommend purchasing the full Adobe Creative Cloud Suite. At $49.99 per month, this is probably a bargain considering what you can achieve with this set of tools.
Creating blog content is a very useful and effective way of consistently building content on a site. When creating blog posts, it's a good idea to do some keyword research to figure out what it is that your audience is interested in and searching for online. Also, be sure to research competitors, forums and social media to narrow down on topics for your blog. 
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