Rule of 37%
You actually listened to me? Incredible. Here, have some nerdy facts.
How do you make the optimal decision, quickly and without knowing the future?
According to statistics, 37% is something that will absolutely probably change your life. If you want to buy a house, choosing the 37th house will give you the likely-optimal choice among 100 houses. If you are looking for a spouse, the 37th person you date will likely be your optimal partner, among the 100 you are planning to date (on the condition that you actually like them).
This is called the "optimal stopping strategy" for decision making.
But what if you're only planning to date 4 people, in like, ever? This blog does not encourage anyone to commit murder.
(Related book: "Algorithms To Live By" written by Brian Christian and Tom Griffiths)