Great post, I've just spent the greater part of the morning reading everything. Shipdog had the best answer IMHO. My own approach follows his/hers. It's pretty intense and laborious but worth the payoff. I'd discovered some neat things to do with treating headaches during my master's thesis but have been too busy in clinic since then to jump through hoops publishing. I'm also very much against sitting in ivory towers with knowledge that needs to be used right now so I decided to go the own-way route first:

1. Self-publishing the document under a CCO license (vital!) as an easily-navigable text on my own blog, snazzy PDF and datasets attached. Then I made an ~1h-long video summarizing the entire report and plopped that on YouTube (with proper timestaps that took forever but oh so worth it), linking it to my blog and back.

2. Next I shared all these on ResearchGate, Academia.edu, and, thanks to this post, Figshare (for the DOI primarily). I had it up on Medium but that just looked ugly for such a huge piece so I took that down (~50 pages without citations). I also shared it on some other niche decentralized social networks I frequent (eg: Diaspora). I would probably also share it on Twitter/Facebook/LinkedIn if I was still there.

3. The last steps I'll be doing shortly: emailing all my patients that I've treated with relevant issues over the years with the blog post (~1000 people), as well as all the main authors I'd cited (~25 folks) and all the therapists I've worked with over the years (also ~25 folks), plus the few relevant professional associations I'm a part of (at least 4, each of which has a reach of a few thousand therapists via newsletters).

I'm doing all this because, applying what I've found, I'm able to resolve muscle tension headaches in a matter of seconds instead of minutes, and I want others to learn how to do this too -- and build on it. Once conversation flourishes with all the above I might look into publishing with a journal (higher sphere peer review is still very useful!) but, as a clinician, this is a lot less important than its application. I'd already had some profs interested in helping me turn this into a journal article but it was crucial to me that this document I'd created remains 100% in my property, mostly so I could then release it under the CC0 license without penalty. Having published the official thesis on my terms like this now, I'm no longer worried about this ever being a threat.

Some more context: my MSc was from a little-known EU program in sport psych, and deals with the crossover between that field and massage, where I've been working for a decade now. And so I say what all the (mostly CS/eng/mathy) folks before have said: your mileage may vary. You can see where the rubber meets the road on https://spmx.ca/trp, and the WP plugin that creates those great collapsible headings is https://wordpress.org/plugins/olevmedia-shortcodes. And why I strongly advocate a CC0 license wherever possible: https://spmx.ca/wp-content/uploads/2018/03/00-headaches.png ; )

Regarding writing better: write more. Remember the famous pottery parable (https://kk.org/cooltools/art-fear, Ctrl+F "ceramics") and the old go saying: "lose your first 100 games quickly". If rejection is a real fear, watch https://www.youtube.com/watch?v=-vZXgApsPCQ. It really doesn't matter, especially if you're making this world a better place. Good luck!