Imagine you are selling ice cream at a park on a hot day. You have to decide in the morning how many ice creams to bring. You want to sell as many as you can, but you also don't want to bring too many and have them melt

Imagine you have a box full of 100 toys. According to the Pareto Principle, or the 80/20 rule, about 20 toys (20%) in that box are your absolute favorites, the ones you play with the most. Those 20 toys give you 80% of your fun and happiness when playing.