The one must-do
Top of the board, large: the single task that defines a successful day. If you complete nothing else, this one thing. Write it as a finished state: 'Bug fix shipped and deployed,' not 'Work on the bug.' If you can't name it in fifteen seconds, spend two minutes deciding before writing.
Time blocks
A timeline from your start time to your end time, divided into one to two hour blocks. Write what work mode goes in each block — deep work, meetings, email, errands. Don't schedule to the minute. Block the type of work, not every individual task.
The three tasks
Below the must-do: two or three concrete tasks in order of priority. These are the next tier — important but not the day-defining item. Each task should be completable in 30–90 minutes.
Scheduled commitments
A column on the right: meetings, calls, and hard deadlines. When are they and how long are they? This section prevents the rest of the day from being planned without accounting for the non-negotiable time constraints.
Notes and scratch
A box in the corner — a free zone for things that come up mid-day. Phone number someone texts you, a quick idea, a reminder to follow up. Having the scratch space on the board means you don't need to switch tools when something arrives.