I Count 4.5 Hours of Deep Work as My Bare Minimum

Three 90-minute sessions. That’s 4.5 hours. I treat that as the bare minimum for an ideal week, and I check the total during my weekly review.

I aim for at least three deep work sessions a week, ideally 60 to 90 minutes each. A week with those blocks protected is predictably more productive than a week that only has open space.

Planned blocks and emergency blocks

Brooks separates planned deep work from what he calls emergency deep work. Planned deep work is scheduled ahead of time, and it keeps the work from going off the rails. Emergency deep work shows up when things are already chaotic.

In that second mode, you clear the calendar, turn on Pomodoro mode, and grind through the most important thing. Brooks says that can work. Planned blocks are still the better system.

Which one are you running? If your strongest focus only appears after the week is already a mess, emergency deep work is your default. Give the normal week three blocks that were chosen in advance.

How I split the day

When I can, I start the day with a 90-minute session, then use shorter 30 to 45 minute blocks later. I also prefer batching meetings onto meeting-heavy days so the focus days stay cleaner. Constantly switching between meetings and deep work on the same day makes it harder for me to stay with the work.

You don’t need a full hour for a session to count. I compare it to a workout. If you only have 40 minutes instead of 60, you still train. A focused 25 to 30 minute session is better than skipping the habit entirely, especially while you are building consistency. I think of a Pomodoro the same way. Short and done beats waiting for a perfect 90-minute opening.

Create one meeting-heavy day and one focus-heavy day next week. Put a 90-minute block on the focus day before the first meeting.

Work you are actually evaluated on

Brooks noted that people often spend time on whatever is in front of them. Which deep work activities move the metrics, goals, or review criteria that actually matter?

In coaching, I map the blocks with the person to activities that would improve a key metric. List your top one to three success metrics and choose the deep work tasks from those. If a task doesn’t touch one of them, it can wait outside the protected time.

Subtract before you add another block

If your calendar is already full, start by subtracting. I remove unnecessary meetings first. I replace some attendance with a transcript and an AI summary, so the person stays informed. The recovered time goes to work tied to their most important metric. I have helped someone transition out of meetings while staying informed.

Audit one recurring meeting. Ask whether a transcript plus an AI summary would be enough. If it would, step out of the next one and put a focus block in that spot.

A ritual your brain can recognize

Brooks’s focus ritual starts with a consistent setup. Focus music, sometimes the same song on repeat. Timers, Pomodoro sessions, content blockers, or the phone out of the room. The goal is to teach your brain that when these cues appear, it’s focus time. Design your own and keep the setup to about five minutes before you start.

Work communication lives in Slack, Teams, and other always-on channels. Brooks named those chat platforms and blurred work boundaries as major causes of focus problems. Even when notifications are off, the knowledge that messages are waiting can create mental noise that pulls you out of the work. Close the communication tools before the timer starts.

Deep work can be social without being collaborative. Brooks pointed to co-working or body-doubling sessions where people work silently alongside each other, online or in person. The accountability of someone else focusing at the same time can make it easier to stay on track. He noted this can be especially helpful for people who struggle with solo focus. Book a silent focus session with a colleague or a friend.

Why I track the hours

Have you checked your deep work hours from last week?

Tracking changes behavior. I compare deep work tracking to a continuous glucose monitor changing eating habits, or a hybrid car display changing driving habits. Once you see the number, you naturally start trying to improve it. Track only one number this week: total deep work hours. That number is my leading indicator for the week.

Calendar events that start with “DW:” get counted each week, logged into a Google Sheet, compared against the prior week, and turned into a weekly review summary with suggested next actions. I run that with Lindy, Telegram, the calendar keyword, and Google Sheets. The same weekly automation also tracks workouts, meetings, and other leading indicators.

I send three focus tasks through Telegram. Lindy is connected to Telegram and my calendar, so the automation finds open blocks and creates events labeled “DW:” plus the task name. That took the calendar Tetris out of weekly planning.

If Thursday mornings always collapse, or if mornings are full of Slack interruptions, move the block. Brooks’s advice is to experiment with the timing and iterate. Tracking helps separate a bad habit from a bad time slot. Review your failed focus blocks and look for the timing pattern.

Put one block on the calendar

Open your calendar and create one focus block before you close this page. Make it 30 to 60 minutes. If this week is already full, put it on next week. The first win is a real appointment with your attention. Label the event “DW:” plus the task so your weekly count can see it.