Should you plan your day the night before?
The short answer
Yes, for one specific reason: choosing what to do is itself a task, and doing it in the morning means paying for it with the hours you were going to use for work.
The best-known version of this is the Ivy Lee method, given to Charles Schwab at Bethlehem Steel in 1918. Its instruction is explicit about timing: write tomorrow's six tasks at the end of today, in order, and tomorrow start at the top without revisiting the order.
The evening timing is not a discipline flourish. It moves the decision away from the moment when you are least able to make it well.
What evening planning actually buys
It removes a decision from the start of the day. A morning that opens with "what should I do first?" opens with an unbounded question. A morning that opens with a written first line opens with work. The difference is not motivation; it is that one of them has a next action and the other has a deliberation.
It happens when you have the information. At 5pm you know what actually happened today, what moved, what is now blocked, and what arrived. At 9am tomorrow you are reconstructing that from memory, badly.
It ends the day deliberately. Writing tomorrow's list is a close, and a close is how work stops following you home. The tasks are somewhere, which is the condition under which it is reasonable to stop thinking about them.
It removes the choosing from the middle of the day too. Deciding what to do next is itself a switch, and it recurs between every pair of tasks. Fixing the order in advance removes every one of those decisions at once — which is where a lot of the day's invisible cost goes.
What it costs
Being honest about this matters, because the method is usually sold without it.
A fixed order cannot absorb news. If something material changes overnight, you now have a list written against yesterday's world, and the discipline that makes the method work — do not reshuffle — is exactly what makes that awkward. The method assumes tomorrow broadly resembles what you expected.
The first item blocks everything behind it. Strict order has a named failure: head-of-line blocking, where one stuck item holds up everything queued behind it. If task one turns out to need something you do not have, a rule that says "do not move on" is now working against you.
Evening is not everyone's clearest hour. The method was designed for executives in 1918 and assumes you have five minutes of clear thought at the end of the day. If the end of your day is the least clear part of it, the planning will be worse than a morning version would have been.
The version that survives contact
A practical adaptation that keeps what the method is for and drops the brittleness:
- Write the list at the end of the day, not the start. This is the part that matters most and is the cheapest to adopt.
- Order it then, deliberately. Ordering is the work. A written but unordered list has only moved the decision, not made it.
- Keep the first item genuinely first. Protect that one. If nothing else survives the day, the first item should.
- Allow exactly one reorder, in the morning, once. Read the list, change it if the world changed, then commit. One revision absorbs news; continuous revision is how the order stops meaning anything.
- Check the first item is not blocked before you commit to it. Thirty seconds. It is the failure mode that costs a whole morning.
Point 4 is a deliberate departure from the original, which forbids reshuffling. The original is stricter than most modern days can support, and a rule people abandon by Wednesday is worse than a slightly looser rule they keep.
Does the number six matter?
Not especially. Six is what the method specifies and there is nothing magic in it — no research establishes six as correct, and none establishes three either.
What matters is that the number is small enough to bind. A list long enough to contain everything is not a decision, and a list that is not a decision does not do the thing evening planning is for. More on where that line falls.
Where to go next
- The Ivy Lee method — the original, its one real discipline, and its failure mode
- What switching tasks actually costs — why removing decisions is worth more than it looks
- How to prioritise your tasks — which method today is asking for
Using this in Decide One
Decide One's Ivy Lee mode enforces the order rather than drawing it: the second line will not open until the first is closed. That is the discipline the method rests on, and it is the part that quietly disappears when the list is on paper.
A line you did not finish is unfinished. It is not marked against you, and a day you did not open is not counted.
Open Decide One — free to use, with no account. Nothing you write leaves your device.
Decide One is a priority instrument. Bring the day into view, choose a method, give the first thing real time.