Gratitude journals do nudge well-being up in controlled studies, but the effects are small. We turned the published effect sizes into plain odds.

A 2015 replication of Ebbinghaus's forgetting curve shows how fast new material fades, and a 1,354-person study shows when a review brings it back.

73 percent of U.S. adults call themselves lifelong learners. Here is what the Pew data says they want, and a low-effort way to learn one new thing a day.

Americans average 5.16 hours of leisure a day and 16 minutes of reading. Here is what 2 minutes of daily learning adds up to over a year.

In a classic experiment, students who quizzed themselves recalled 61 percent a week later. Students who reread four times recalled 40 percent.

Americans 65 to 74 have 6.9 hours of leisure a day, and 4.2 of it goes to TV. A daily fact by text is a small way to spend a little of it learning.

A meta-analysis of 35 studies found written corrections improved accuracy (g = 0.59), and most of the effect lasted. What that means in practice.

A survey of 1,604 US phone owners shows why people quit health and habit apps. Effort beats boredom as the reason, and the fix is simpler than a new app.

The 21-day rule is a myth. We ran the numbers from the two best habit-formation studies, and the honest answer is two to three months, longer for exercise.

Using the 2025 American Time Use Survey, we ranked common habits by how many days a week the average American really does them. Exercise lands at 1.6.

We took the raw figures from a goal-setting experiment and a weight-loss trial and computed what telling a friend actually adds. It is most of the gain.