Learning science has revealed a sweet spot: 85/15 — succeed about 85% of the time and fail 15% of the time. A 15% failure rate keeps your brain challenged, alert, and primed for growth, without tipping into, “This sucks, I want to quit” mode.
Leverage the 85/15 rule by designing practice drills with an 85% success rate. For example, if you're learning to play the guitar, adjust the difficulty of your chord transitions so you're screwing up roughly 3 out of 20 transitions. If you're learning to serve a tennis ball, adjust the target zone size or hitting speed until you canland 17 out of 20 serves.
When learning a new subject, tell an AI chatbot: "Give me 10 sentence completion exercises using the following material. If I get more than 8 right, make the next set harder. If I get fewer than 8, make it easier."