Keep track of your affiliate links through some kind of spreadsheet or document to keep yourself organized. As you grow this income stream, you will add more affiliate links. Over time, it can become a large number of affiliate links. Start an organization system early to avoid stressfully searching for your affiliate links in a mountain of emails later on.
Running errands and other odd jobs. Users of TaskRabbit.com post any task they need help with, ranging from data entry to delivering balloons from a shop to a home. TaskRabbits bid for the jobs and get paid upon completion. I have hired a “Rabbit” to deliver a truck full of diapers to a charity event. My friend Lynn hired a tech-savvy Rabbit to create a themed playlist for a baby shower. If you can handle doing someone’s grocery shopping while you do your own, this could be for you.
If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog. 
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