You should really share the things you found to be force multipliers! You spend a lot of time explaining how hard they are to find and then you don't even share yours :)
One thing that I suspect has been a force multiplier for me: I have a digital notebook, and I managed to train myself for a bunch of the pages to "hook in to my life" at certain situations. For example, I have a page for when I get home from work, for when I get up in the morning, for when I go to sleep, etc. And also pages for when I encounter specific failure modes like being insufficiently alert, needing to take a break, etc. (As a way to train this habit, I suggest training the proto-habit of writing down a description of any failure mode you notice yourself entering for later review.) Then whenever I read about a new technique that seems worth using, I figure out the specific situations where it's worth using and put it on the appropriate page. Unfortunately I have been getting worse about using my pages as time goes by.
Most self-improvement interventions seem to fade away eventually, but one that has stuck for quite a while for me is a Chrome extension I wrote to block the "related links" sections you see on webpages. This seems to have substantially cut down on the amount of time I waste online. (The key may have been to change my "oh, that looks like an interesting link" habit in to an "oh, I should add another rule to my extension to block this kind of link" habit.) I was interested in it specifically because it seemed like a painless way to make myself more productive that would not reverse itself, and that has turned out to be the case so far (have been using it since late January). I'm quite interested if people have other ideas for these sorts of not easily reversible capacity gains. And if enough people are interested in my extension I could probably release it. (You can view the code here but at this stage you'd probably have to read the source to get it to work. It also does lots of other things aside from blocking "related links". My overall objective was to add enough drag to my internet use in various ways so that I would make everything I did online intentional instead of mindless.)
Better nutrition, exercise, and sleep are also arguably force multipliers.
Unfortunately I have been getting worse about using my pages as time goes by.
Massively downgrade your expectation of your average self to deal with a complex system. Adding complexity to a useful habit should be entered into very cautiously.
For a while now I've been very interested in learning useful knowledge and acquiring useful skills. Of course there's no shortage of useful knowledge and skills to acquire, and so I've often thought about how best to spend my limited time learning.
When I came across the concept of Force Multiplication, it seemed like an appropriate metaphor for a strategy to apply to choosing where to invest my time and energy in acquiring useful skills and knowledge. I started to think about what areas or skills would make sense to learn about or acquire first, to:
There have been a small number of skills/areas that have helped me surge forward in progress towards my goals. I look back at these areas and wish only that I had come across them sooner. As most of my adult life has been focused on business, most of those areas that have had a tremendous impact on my progress have been business related, but not all.
So far I've found it hard to identify these areas in advance. Almost all of the skills or knowledge that I learned, that had a large impact on progress towards success, I pursued for unrelated reasons, or I had no concept of how truly useful they would be. The only solution I currently have for identifying force multipliers is to ask other people, and especially those more accomplished than me, what they've learned that had the most impact on their progress towards success.
So, what have you learned that had the most impact on your progress towards success (whatever that might be)?
Can you think of any other ways to identify areas of force multiplication?