Great article, I have tried a few over the years. I had a side business cleaning offices for years. It did great, but I hated never being able to take more than 3-4 days vacation, so I eventually gave up. I tried MTurk, but if you multiplied my earnings on an hourly basis, it was a little over $6/hr. My blog is much worse, probably less than $0.25/hr.
Work remotely for a call center. Because many call center jobs are location independent, finding work in this field is an easy way to earn some money from home. Dozens of sites list job openings for call-center representatives, including Freelancer.com and SimplyHired.com. Meanwhile, you should check local job listings for openings and opportunities as well.
Read product reviews before you buy. Decide whether a desktop or a laptop is best to suit your needs (Ex. You will likely need a desktop to get a customer service position. On the other end of the spectrum, proofreading can be done on a tablet if necessary.) And, while you’re budgeting for new hardware, don’t forget to factor in a good headset – many remote jobs require them. (To increase your marketability, you can also add a decent mic and an all-in-one printer. Or even a foot pedal if you’re going into transcription.)
Fiverr: Israeli-based Fivver was started in 2010 by Shal Wininger and Micha Kaufam. It's a great resource for selling just about any service online. You can offer gigs as low as $5 but also get paid much more for upgrades and add-ons. There are plenty of providers earning 6 figures on Fiverr so it's definitely a worthwhile cause for generating a healthy income. Just ensure that you provide some serious value.
There are two basic markets you can sell to: consumer and business. These divisions are fairly obvious. For example, if you're selling women’s clothing from a retail store, your target market is consumers; if you're selling office supplies, your target market is businesses (this is referred to as “B2B” sales). In some cases—for example, if you run a printing business—you may be marketing to both businesses and individuals.