A month, folded into one line.

01 — the diaryFive page types. One question a day.

Do One Thing is a printable paper diary — five page types you print on whatever cadence suits you. It exists to make one decision unavoidable each morning: of everything you could do, which single thing matters most. You write that line, block the hours that will defend it, and finish it before the day claims you.

This page is the tour: how the diary funnels a month down to a morning, what each page asks, and the thinking behind it.

Most days don't need a to-do list. They need a decision. — the diary, in one sentence

02 — the cascadeFrom the month to the hour.

The most important task today isn't pulled out of thin air. Behind it sits a quieter, slower decision — what matters this month, what matters this week — made on a different page, on a different schedule. The daily line is the smallest link in a chain that starts months earlier.

Think of the diary as five pages of progressively tighter focus. The wider pages set the direction; the narrower pages do the work.

Follow the example below on launching a dashboard.

You're not guessing each morning. You're cashing in a small piece of a bigger decision you already made.

It also fails honestly. If the daily lines don't add up to the weekly priorities, you notice on Friday. If the weekly priorities don't move the monthly direction, you notice at the end of the month. The page is the audit.

03 — the pagesFive pages, widest to narrowest.

One decision — [M1], launch the dashboard — was set on the first of October. Scroll down and watch it travel: pulled onto the week, narrowed to a single Tuesday, defended with two protected hours, and — by the weekly review — the dashboard is shipped.

Monththe month's intentions

Monthly PlanningFour goals that matter this month, coded M1–M4.

Weekpull the code down

Weekly PlanningThe month’s goals, pulled down and given days.

Daythe one thing

Daily Goal SettingThe one thing today — plus tomorrow’s, set tonight.

Plannerprotect the hours

Daily PlannerThe hours, blocked and tagged to the goal they serve.

Reviewdid it ship?

Weekly ReviewThree questions, five minutes. The week, read back.

Hover any page to see what it holds · tap to read it full-size.

The daily and the planner run each morning. The monthly and weekly take a few minutes at the start of each period — and they're what make the daily line mean something. The weekly review takes five minutes on Sunday.

04 — philosophyWhy one, not many.

After years of Notion databases that became junk drawers, the diary started as a kind of surrender. Every organiser — Notion, TickTick, ToDoist, paper lists — eventually turned into the same thing: a bucket of fifty tasks that never got done — most of which shouldn't have been there. It's never the tool's fault. Each one is well-built. But more capture, more views, and more structure all answer the wrong question — and each ends the same way:

The common failure isn't laziness or the wrong app. It's the absence of a decision — a longer list is just a way of postponing the choice of what actually matters today.

The diary is what's left after giving up on managing the bucket. Instead of holding everything, it asks for one line: the single thing that, finished today, would make the day count. That's why one beats many — not because less is virtuous, but because a day spent on the one thing that moves the needle beats a day spent tending a list.