Job well done, Satrap. The first thing I look for in a site like this are signs that the author is being paid to hype the companies. It’s very tough to find good information that isn’t stricken with bias. There were a couple of times during the article where I actually got excited thinking, ‘Hey, I could do that. I’d actually LOVE to do that.” That being said, I can’t help noticing that you refer to all of it as “extra” or “supplemental”income. Are you saying that with all of these options, sticking to one’s regular “day job” is required? In your experience, if someone really commits to doing this, is it possible to earn a decent living? Cubicles suck.
Network Marketing is somehow relating to affiliate and digital marketing, a flexible way of earning money by getting more and more attention and people involved to the same. This is one type of a business, which requires a network to be formed betwixt various people involved in the same. There is a low upfront investment involved, for the purpose of registration or buying certain product sample. The criterion is to make your contacts and sell the product but some people actually compensate more participants to the network and hence get paid for it. Most of the revenue comes from recruiting new participants. But before joining any Referral Marketing Company do check its legal papers and working process because there are many people who are running fraud companies under the shed of Referral Marketing as suggested by Lokesh Tanwar founder of Business Alligators.
One of the best ways students can earn money quickly is to take paid online surveys. There are plenty of legitimate survey companies or sites that will let you create an account with their sites. If you fit the demographic that a survey is targeting, you will most likely qualify to take that survey.  Some great survey sites that pay cash for taking service are listed here.
Data entry is a simple job that students with basic computer and fast and accurate typing skills can do from the comfort of their computer. Typically, data entry work involves typing up data fast and accurately for clients. Many students earn money working part-time doing data entry jobs. You can find genuine data entry jobs on the following websites:
×