Universal laws
Parkinson’s law: Work expands to the time you give it. Shrink the time, shrink the task
Hofstadter’s law: Everything takes longer than you expect, even when you account for Hofstadter’s law.
Hanlon’s Razor: Never attribute to malice what is adequately explained by carelessness or stupidity.
The Preto Principle (80/20): Roughly 80% of the results come from 20% of the effort.
The Peter Principle: People get promoted until they reach a job they are bad at, then they stay there.
Hick’s law: More options means slower decisions. Cut the menu, decide faster.
Goodhart’s law: When a measure becomes a target, it stops being a good measure
The Dunning-Kruger Effect: The less you know, the more you overestimate how much you know.
Occam’s Razor: Assume the simplest explanation is the correct one until you have evidence that it isn't
Chesterton’s Fence: Don’t tear something down until you know why it was built in the first place
Brook’s law: If you add more people to a projector that’s already late, it’s going to be even more late, because we underestimate co-ordination costs.
Hitchen’s razor: What can be asserted without evidence, can be dismissed without evidence.
Cole’s law: it’s mostly shredded cabbage. 
Green’s Law of debate: Anything is possible if you don’t know what you are talking about.
Living in an old house law: Never change a light bulb unless it's a 3-day weekend.
Dave’s Law: Never start a “quick”project at the end of the day. It will always take at least 3 times longer than if you start it tomorrow.
Jesse's Law: whatever time you tell your wife the project will take, she will need to multiply by three to be more accurate.
Lego's Law: If you are looking for it, you will not find it, but if you are not looking for it, it will be everywhere you look.
Maslow's Hammer: If all you have is a hammer, everything looks like a f…….g nail.
Murphy’s law: Anything that can go wrong will go wrong, and at the worst possible time.
Freber’s Law: Murphy was an optimist.
Murphy’s Law 2: If you have a 50/50 shot to get something right, 90% of the time you’ll get it wrong.
Murphy's Law 3: the best way to get the right answer on the internet is not to ask a question but to post the wrong answer.
Thissen’s Gastronomical Law: "The hardness of the butter is directly related to the crumbiness of the bread.”
St. Achualys law: there is always someone on the internet that knows better.
The Cliver Theorem - The further you are from the actual work, the easier it is to do.