What’s inside
- One big — 90 minutes or more. The task that makes the day count.
- Three medium — 30 to 60 minutes each.
- Five small — 5 to 15 minutes each: replies, bookings, quick fixes.
- Fit check — the total against your free hours.
- Swap rule — what to do when something urgent arrives.
Where it comes from: the 1-3-5 rule was popularized by the career site The Muse in the early 2010s as a way to make daily to-do lists realistic. It has no formal research behind it; it is a practical rule of thumb.
When to use it (and when not)
Use it if your lists are either 25 items long or a single giant task. The fixed sizes push you to break big work down and to stop treating every small thing as a priority.
It fits less well on days with more than four hours of meetings — try 1-2-3 instead. And it does not rank tasks; if order matters more than mix, use the Ivy Lee method.
How to use it
- Check tomorrow’s free time. A full 1-3-5 day needs about 4 to 5 hours outside meetings.
- Pick the one big task. If it is bigger than three hours, take one chunk of it.
- Pick three medium tasks. At least one should be something you have been putting off.
- Pick five small tasks. Batch them into one or two slots rather than scattering them.
- Do the big one first if mornings are your best hours.
- Swap, do not add. When something urgent comes in, it replaces a task of the same size.
How Needt fills it in
Needt reads sizes from your estimates. Type the nine tasks with durations — “wireframe 2h”, “edit newsletter 45 min”, “book courier 5 min” — and auto-scheduling places the big one in your highest-energy slot, the medium ones in the next longest gaps, and the small ones together where short gaps are left. If a meeting moves, it rebuilds the day and shows what moved.
To build the list itself, ask:
Make me a 1-3-5 list for tomorrow from my open tasks. The big one should be the Lumen wireframe.
You can save a Workspace view filtered to today’s tasks, sorted by estimate, to see your 1-3-5 at a glance.
A worked example
Alex’s Thursday, Oct 15, with one 30-minute call.
- 1 big: Draft homepage wireframe (2h) — 09:00
- 3 medium: Edit October newsletter (45m) · Update five shop listings (45m) · Spanish lesson 5.1 (30m)
- 5 small: Book courier (5m) · Reply to Sam (10m) · Order boxes (10m) · Pay phone bill (5m) · Rename product photos (15m) — batched 15:30–16:15
Total: about 5 hours of task time.
