How to Prioritise Tasks with the A-B-C System: From Overwhelm to Organisation

Four-panel comic showing a person transforming from overwhelmed by tasks to calm and organised using the A-B-C prioritisation system

Does your to-do list feel like a never-ending scroll of doom? You're not alone. The secret to turning chaos into calm isn't doing more—it's prioritising tasks with intention. The A-B-C system is a simple, powerful method that helps you identify what truly matters and gives those crucial tasks the time they deserve. Let's walk through how this transformation happens, one letter at a time.

List Your Tasks

Before you can prioritise, you need to see everything in one place. Grab a notepad, open a document, or use your favourite notes app and brain-dump every single task that's floating around in your head. Don't judge, don't organise—just get it all out. This step alone can feel liberating, as if you're taking the weight off your mind and putting it somewhere visible.

Your list might be long, messy, or intimidating. That's perfectly normal. The key is to externalise the mental clutter so you can work with it instead of against it.

Rate A, B, C

Now comes the game-changer: assigning a letter to each task. Here's the system:

  • A tasks are your non-negotiables. They must get done today, or there will be real consequences.
  • B tasks are important and helpful, but the world won't end if they wait until tomorrow.
  • C tasks are the 'nice to do' items—they can wait without causing any issues.

Go through your entire list and mark each item honestly. This process forces you to confront what's genuinely urgent versus what's just loud. A labelled task without a plan is like a plane without a runway—it's not going anywhere. Rating your tasks is the first step in giving them direction.

Schedule Your 'A's

Here's where the magic happens: take every single A task and book it into your calendar as a fixed appointment. Treat it like a meeting you can't miss. If 'Finish report' is an A task, don't just leave it floating—give it a specific time block, like 10:00–11:30 AM.

If an A task feels overwhelmingly large, break it down into smaller, actionable steps. 'Finish report' becomes 'Outline report,' 'Draft section one,' and 'Review draft.' Each mini-step gets its own short calendar block. This makes starting feel manageable and procrastination much harder to justify.

By scheduling your A tasks, you're committing to them. Your calendar becomes a realistic roadmap, not a wishlist.

Feel in Control

Once your A tasks are scheduled, something shifts. Instead of staring at an endless list feeling paralysed, you have a clear plan. You know exactly what you're doing and when. The overwhelm fades, replaced by a sense of calm control.

At the end of each day, spend five minutes updating your list. Move any incomplete A tasks to tomorrow, reassess your B and C items, and schedule your new A blocks. This daily ritual keeps you proactive rather than reactive, ensuring your time serves your priorities—not the other way around.

Your to-do list isn't a buffet where you try to do everything. It's a curated menu of what truly matters. With the A-B-C system, your day stops running you—you start running your day.

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