When I first designed my web with MS FrontPage a few years back, there were few sources online to explain how SEO worked best. For those owning websites that are your principle contact to a public that is searching for your services, backlinks are crucial to your success.
I read that 'reciprocal linking' was the way to do things initially, especially if you were brand new online. This entailed contacting others in similar related industries to offer a link from your resource page to theirs, and vice versa.
This worked great and I found several real estate webs that offered a link back if I featured their logo even. This method does raise your value to the main search engines, and you will rise in SERPs (Search Engine Result Pages).
Fast forward and now you rarely hear of this easy way to get "noticed" online.
A more authoritative link back is from an article you have written or a mention from a regarded web or blog. The higher the value the source is to the SEs algorithms, the higher you will place in SERPs for your search terms.
One way to find a source that will link back to you is to do a search by simply type a few words describing your service followed by 'write for us'. A list of content providers will show in the results and you can decide which would be best for you. Try it.
I just finished the procedure mentioned and realized this was something of high value worth repeating... often! I stumbled onto a blog that was authored by a Canadian commercial architect. I simply commented on an interesting article and was pleasantly surprised that a link back to my web was immediately published online! It can't be much easier than that.
You may have hobbies not directly related to your business and while links back from those may not be of high value, you just never know who will read what your experiences are and possibly contact you.
The blogs you post here are great fodder for a rewrite, as some of the sources require exclusive content. Writing a compelling story about something unique in your life, area, or business may be worth honing to offer to CNN, Forbes, Marketwatch, etc. A link back from these highly reputable news organizations would push your SERPs up big time.
You can also find out who is linking back to your competitors and investigating these links will indicate what is 'working' for them and what type of content they have offered to other blogs and relevant webs. Here is a simple tool to use to find those backlinks: https://www.thehoth.com/backlinks-checker/