The Problem with Time Blocking (And What to Do Instead)

If you read any productivity blog, you'll eventually come across "time blocking." The advice is simple: schedule every single minute of your day on your calendar. 9:00 AM to 11:00 AM for coding, 11:00 AM to 12:00 PM for emails, 1:00 PM to 2:00 PM for meetings.

In theory, it's brilliant. In practice, especially for software engineering, it often falls apart before lunch.

The Myth of Predictable Work

The core issue with rigid time blocking is that it assumes your work takes a predictable amount of time.

But as any developer knows, estimating the time it takes to fix a bug or implement a new feature is notoriously difficult. Sometimes a "quick 30-minute fix" turns into a three-hour rabbit hole because of a bizarre edge case in an external library.

When your 9:00 AM "coding block" inevitably spills over into your 11:00 AM "email block," the entire schedule cascades into failure. You feel like you're constantly behind, playing catch-up against an arbitrary timeline you invented the day before.

The Maker's Schedule Needs Flexibility

Paul Graham famously wrote about the "Maker's Schedule, Manager's Schedule." Managers thrive on hourly blocks because their job is a series of distinct tasks and meetings. Makers (like developers) need large, uninterrupted chunks of time to build context and get into flow.

When you artificially slice your day into rigid blocks, you introduce context switching. You might be deep in the zone solving a complex problem, but if your calendar says it's time to check emails, you force a cognitive gear shift. Getting back into that deep flow state later can take 20-30 minutes of wasted effort.

What to Do Instead: The Priority List

Instead of scheduling when you'll do things, focus on what you'll do.

Here's the flexible approach that has actually worked for me:

1. The Top Priority: Every morning, pick one major task. This is the thing that, if completed, makes the day a success.
2. The "If I Have Time" List: Pick two or three smaller, secondary tasks.
3. Protect the Block, Not the Minutes: Block out 3-4 hours of uninterrupted time on your calendar (usually the morning when you have the most energy). Don't schedule specific tasks within it. Just protect it from meetings.
4. Work Until It's Done (Or You're Stuck): During your protected time, start on your Top Priority. Work on it until it's finished, or until you hit a hard roadblock. Then move to the secondary tasks.

This approach gives you the structure you need without the guilt of a rigid, failed schedule. You prioritize the most important work, but you give yourself the grace to let tasks take the time they actually need.

Productivity isn't about perfectly Tetris-ing your calendar. It's about consistently making progress on the things that matter.