I vehemently disagree with you here. Content mills horribly abuse writers and make it difficult for people who have spent years in this field to get a fair wage due to the expectation that companies can pay less to get more. Also, writers who start out here often get stuck in a rut and can’t evolve past the oDesk stage. All around bad news and not recommended for anyone who wants an actual career in writing.
I noticed that you suggested creating health content for a client. I am a retired medical practitioner with a secondary degree and experience in areas related to public health and safety. I believe I could be helpful by writing content for, or at least editing for, medical science or public health entities. I’m willing to cold-pitch but don’t know where to find these. I’m not even sure of whether cold- pitching is best for the sciences or public service. Please advise?
The online application process for these jobs—or perhaps “gigs” is the better word, since they're all for independent contractors—is pretty simple and straightforward with very little required of candidates. Some of these opportunities—like the micro-jobs—you could very well apply and start the same day. And these jobs require very little commitment and can typically be done on your own schedule.