Guides
Short, practical explainers on how attention actually works — and how to spend and restore it. Every guide draws on published research, named where it matters. Then put it to use in the FocusBro app.
How Long Should a Pomodoro Be? Sizing Your Focus Intervals
Why the classic 25-minute Pomodoro works, what research says about breaks, and how to size focus intervals to your task and attention span.
Ultradian Rhythms: Why Focus Comes in Roughly 90-Minute Waves
Nathaniel Kleitman’s Basic Rest-Activity Cycle and what ultradian rhythms suggest about pacing deep work in ~90-minute blocks with real recovery.
The 20-20-20 Rule: A Simple Fix for Screen Eye Strain
What digital eye strain is, why staring at a screen tires your eyes, and how the 20-20-20 rule recommended by eye-care associations helps.
The Physiological Sigh: The Fastest Way to Calm Down
The double-inhale physiological sigh, the research behind it including a 2023 Stanford trial, and how to use it to lower stress in about a minute.
Attention Restoration Theory: Why Nature Breaks Rebuild Focus
The Kaplans’ Attention Restoration Theory, the research on nature and directed attention, and how to get the effect even from a window or a short walk.