100/0 rule – you should be 100% certain 0% of the time.
80/20 rule – 80% of output is caused by 20% of effort (not literally true, but true in spirit most of the time).
77/23 rule – the poorest 77% of the world’s population accounts for approximately 23% of the world’s income (GDP figures 2010) [1]
75/25 rule – not more than 25 percent of the total unlicensed seaman on board a documented vessel shall be aliens lawfully admitted to the United States for permanent residence [2]
70/30 rule – if you’re trying to persuade someone, spend 70% of the time listening and only 30% of the time talking (so as to deeply understand the other person’s perspective, goals, and incentives, and to make sure they feel deeply understood) [3]
70/20/10 rule – devote 70% of your efforts to the work that you already know how to do and are good at, 20% to other opportunities for growth that you’re confident are a good idea, and 10% to more speculative or ambitious challenges
60/40 rule – in relationships, both parties should aim to put in 60% of the work and only expect to get 40% back (or, put another way, if you think you’re doing half the work in a relationship, you’re probably doing less than half, so plan to do what feels like 60% to you) [4] [5]
50/50 rule – in conversation, you should spend about half the time listening and about half the time talking (i.e., if you’re talking far more than this, you might be hogging the conversation or annoying your conversation partner, if you’re talking far less than this you may be creating extra work or stress for your conversation partner)
40/60 rule – if you’re trying to build a brand, spend only 40% of the time creating content and 60% of the time promoting it [6]
30/70 rule – if you run an organization, you should spend 30% of the time working on leading the organization in new initiatives and 70% managing the execution of existing initiatives [7]
25/69/6 rule – 25% of the rules on this list were written by me for the purpose of this post, 69% were cooked up by others in order to sell books or make snappy headlines, 6% are regulations about seamen.
10/90 rule – 10% of what your experience is like is determined by what happens to you, 90% is determined by how you react to and think about what happens to you [8]
3/97 rule – if you spend three years working your ass off at something, you can become better than at least 97% of people in the world at it
1/99 rule – 1% of the artists (or musicians) make 99% of the money
1/9/90 rule – in online communities, 1% of users contribute most of the activity, 9% of users each contribute a little bit of activity, and 90% are lurkers who never contribute
0/100 rule – 0% of the rules on this list are 100% true, but 100% of the rules on this list are more than 0% true (except perhaps this one)
[1] http://www.statisticalforensics.com/economic-inequality-cha…
[2] https://www.uscg.mil/…/Citizenship%20Req…/75%2025%20Rule.pdf
[3] http://hansengroupcompany.com/the-7030-rule-of-communicati…/
[4] https://www.theodysseyonline.com/60-40-relationship-rule
[5] https://rogerrelevant.wordpress.com/2013/05/29/about-roger/
[6] https://www.hatchforgood.org/…/the-40-60-content-rule-less-…
[7] http://www.talkingstory.org/2009/07/the-3070-rule/
[8] https://www.slideshare.net/Pre…/the-10-90-rule-stephen-covey
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