Make sure it's easy to share your content – I love sharing posts on social media. However, it gets frustrating when some blogs make it more difficult than it needs to be. You should always make sure it's easy for readers to share your content, which means your social media icons should be easy to find, all of the info input and ready for sharing (title, link, and your username), and so on. Also, you should make sure that when someone clicks on one of your sharing icons the title isn't in CAPS (I've seen this too many times!). No one wants to share a blog post that sounds like you're screaming at them.
Be aware that many blog hosting services only allow their proprietary contextual ad service, and may shut down your blog if you use one not made by the host company. If you are hosting your own blog, you should research contextual ad services and choose one that shows appropriate ads. Some allow pornography or other ads that may not be suitable for your blog.
The truth is, it's not as easy to carve out your space on the web and make a name for yourself as a blogger today, as it was back when blogging was brand new. And it takes a lot of time to build your audience to the point where it's successful. (The most successful, multi-million dollar blogs today were started around 2005 or earlier.) So it's definitely not something you can get rich quickly with, though many people do work on their blogs full time.
Have in-depth knowledge in your niche? Package it up into an ebook and sell it on your blog. I'd generally advise against selling it (at least exclusively) on Amazon or Kobo, as you'll probably be able to charge much less. If you've already built up a solid audience, you can probably change anywhere from $5 for a very short one, all the way up to $39+.
Oh yeah, I also do all of the above for articles that I write for other blogs. So, if I'm guest posting on a blog, I tend to share it even more than I do my own content. If you guest post on a person's website, you should do the same – the more you share it, the more traffic that person will then get, and the more likely they are to re-share it too.
As you build up your blog, expect to receive multiple sponsored post requests each day. These native ads can be a highly effective way for businesses to reach your audience in a non-threatening way - and they can be a highly effective way for you to make a lot of money. Just make sure the posts are actually interesting and relevant to your audience, and that you fully disclose the sponsored nature of the post.
Your newsletter is all yours. Unlike social media sites, your newsletter and email subscribers are all yours, and you have their undivided attention. You don't have to worry about algorithms not displaying your content to readers, and this is because they are your email subscribers. You aren't fighting with anyone else to have them see your content.
Premium content can mean any type of content you charge for - an ebook, whitepaper, downloadable guide, etc. But what I'm referring to here is pay-gated content. Basically you just put some awesome content up behind a paywall, which means visitors pay to access it. You can get your own paywall set up in 10 minutes or less using a plugin like MemberPress or Paid Memberships Pro.
If your niche doesn’t allow you to promote or build premium products (anything over around $100 per unit) then think about getting a solid mix of offerings and building it up over time. I remember Darren Rowse saying that initially Amazon Associates was a really small source of income but over the years it has really started to add up. Think eBooks, affiliates, consulting, books, etc. and you’re starting to build an income stream.