Ideas worth learning

Closing the book and struggling to recall it beats rereading: a week later, self-testers remembered 61%, rereaders 40%.

Try it: After a chapter, close the book and write down the three main points.

Ten minutes of vocabulary on three different days beats thirty minutes in one night — memory grips harder when it must reach back.

Try it: Split your next cram into short sessions on three different days.

A positive result on a good test for a rare disease is often a false alarm — first ask how rare it is.

Try it: Ask of any test result: out of 1,000 people like me, how many really have it?

Students guessed their thesis would take 34 days; it took 56 — judge by how long things took last time.

Try it: Before you promise a deadline, check how long the last similar job took.

“I’ll exercise more” rarely happens; “when I pour my morning coffee, I’ll walk ten minutes” far more often does.

Try it: Write one sentence: “When [moment], I will [action].”

The real price of a $1,000 holiday is the best other thing that $1,000 could have bought you.

Try it: Before a big purchase, name the one thing you’d buy instead.

Your worst-ever headache usually eases whatever you take, so useless remedies look like cures — extremes drift back to normal.

Try it: After a great or terrible week, expect the next one to be more ordinary.

See a $300 jacket first and the $120 one looks like a bargain — the first number sets the scale.

Try it: In your next negotiation, say your number first.

Doing nothing is still a choice — and most people get whatever the form, plan or subscription picked for them.

Try it: List everything that auto-renews and decide each one on purpose.

At 7% a year, money roughly doubles every decade — $1,000 left alone for 40 years grows to about $15,000.

Try it: Pay off the card that compounds against you before you invest.

Reward hospitals for shorter stays and some send patients home early, only to see them return — the number improves, the care doesn’t.

Try it: For a number you chase, ask how you could hit it without getting better.

“They don’t build them like they used to” — the badly built old houses were knocked down long ago.

Try it: When you hear a success story, ask who did the same thing and failed.

On speed dates, people who asked more follow-up questions got more second dates — most of us ask far too few.

Try it: In your next conversation, ask one more question before telling your own story.

Before the house move, imagine it’s already a disaster and ask why — people name real risks they’d otherwise keep quiet about.

Try it: Before a big plan, imagine it failed and list the reasons.

We Google “is coffee bad for me?” and stop at the first answer we like — we test beliefs by hunting for agreement.

Try it: Search for the strongest case against something you believe.

We read a rude email as a rude person — often it’s a rushed person on a bad day.

Try it: Before replying to a sharp message, name one ordinary reason they might be rushed.

Walking out of a dull film you paid for is fine — the ticket is gone whether you stay or not.

Try it: Ask of something you’re stuck in: starting today, would I choose this?

Small schools crowd both the top and bottom of the rankings — fewer pupils means bigger swings by chance, not better teaching.

Try it: Trust 400 reviews at 4.6 over three at 5.0.

Students in an embarrassing T-shirt guessed half the room noticed; under a quarter did — everyone’s busy with themselves.

Try it: Do the slightly awkward thing; far fewer people are watching than you think.

Most people feel sure they know how a zip works — until they try to explain it, step by step.

Try it: Explain out loud how something you use every day works.

Hanoi paid a cent per rat tail in 1902, so catchers cut off tails and let the rats go breed.

Try it: Before you reward something, ask what the laziest way to earn it is.

Barbra Streisand sued to hide a photo of her house; it had been downloaded six times, then drew 420,000 visits.

Try it: Before any new rule, ask “and then what?”

Before removing a fence that seems pointless, find out why someone built it — “pointless” often means “not yet understood.”

Try it: Before deleting a rule or habit, find out why it started.

Tap a famous song on a table: you hear the tune, your listener hears knocking — and almost nobody guesses it.

Try it: Explain your work to a newcomer and notice where they get lost.

Students who saw a lecturer act warmly also rated his accent and looks better — and denied the warmth had any effect.

Try it: When hiring or buying, rate each quality on its own.

“He’ll quit and open a café” feels likelier than “he’ll quit” — but adding a detail can never raise the odds.

Try it: Think in counts: of 100 people like this, how many?