Alright, let's do it. The thing with minimalism is that you can't usually identify that magical 20% straight away, it's far easier to identify the 80% that isn't really working, and whatever you're left with.... you get the idea.
The 80%
Clothes - beyond a very basic level of effort, I've never found them to have much of an impact on how things turn out. Something I used to put far too much focus on.
Working out - look, I'd love to believe there's a linear return on investment here, but once you're in "reasonable" shape the benefits really seem to tail off.
Second dates - as in a date-date, as opposed to an extremely obvious pretense to hook up. Second "dates" have overwhelmingly been a waste of time.
Sense of humour - I used to think this was everything, but I was wrong. Another law of diminishing returns when it comes to seduction - a little goes a long way.
The 20%
Conversational skills - one thing I do really well is turn small talk into something real and intimate and unexpected. That has been huge for me over the years.
Audacity - big risk equals big rewards in my mind, whether it's an over the top joke about anal on the first date, or calling out a sh!t-test to her face. Every time I think I might have overreached I find myself thinking "I can't believe that actually worked".
What's your own 80/20 SoSuave?