If you have a propensity for writing and you can slay with your prose, consider writing an ebook. While the market has certainly become saturated as of late, books that help teach people about a technical topic still sell extremely well. This is a great source of passive income but does require a large amount of effort at the outset before any money is generated.
I just started implementing some affiliate offers to my blog. And I agree that you have to find the balance of offering something to your readers without being too pushy or like what you said without selling your soul haha. For me sine my blog is about travel i just mention where I stayed or what hotel and if I liked it and I recommend it I put an affiliate link.
Writing an eBook and selling it on your blog can be a great money maker. Your eBook should be directly relevant to your blog’s content so you can sell your book to your existing audience. Creating a recipe eBook for a food blog or an eBook full of training plans to complement your fitness site are just a couple of examples that have the potential to sell.

Etsy: While Etsy's popularity has declined recently, it's still a great resource for selling handmade items online. No need for complex ecommerce sites or merchant accounts or any sort of automation. The company takes a commission of every sale and charges a small listing fee per item. But many still use Etsy as their primary source of income. The best part is that you can also sell digital products on here such as poster designs. 
One last note. I’ve been asked what I think of other affiliate marketing resources, both free and paid. I’m familiar with some of them, not all. I’ve read ebooks, watch videos, bought courses and more. So far, the only paid-for course that has impressed me enough to recommend is Kayla Aimee’s Affiliate Acceleration: Impactful Strategies To Increase Your Passive Income.
Every year, hundreds of millions of documents are notarized in the United States: wills, mortgages, citizenship forms, handgun applications. While for decades, this has all been done in person, there is a budding crop of sites that allow notaries to take their services online. If you’re already a notary, you can sell your services online. Or, if you want to get started, check out the National Notary’s checklist for becoming a certified notary.
Win-win-win. The advertiser wins because they only pay when a purchase is made (as opposed to the shotgun approach of paying to advertise to the masses and waiting for a small percentage to actually buy). The affiliate wins because they make money while providing helpful advice. The customer wins because they get a trusted recommendation for something they might not otherwise have known about.
Sites like Zyoin and WiseStep connect employers with prospective employees, many of whom are already employed and not actively job-hunting via networking. The main benefit is knowing who these qualified candidates are. Rewards for referring a candidate who gets hired range from $50 to potentially several thousand dollars. If you know a stream of job-seekers, this is a great way to break into the recruiting business without the need for overhead costs.

If my piece of content is so unique and valuable around hiking backpack recommendations, that other reputable outdoor websites are willing to link to it and build the page’s authority, then I’d have a very real opportunity to rank high in organic search for these search terms (meaning, my page will come up first when someone searches for hiking backpacks).

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