The 80/20 Rule (Pareto Principle)
A few tasks drive most of your results: find that 20% and give it your best hours.
Label every task A to E by what happens if you skip it, then clear the A tasks first.
5 min read · Updated Oct 15, 2026
The ABCDE method turns a flat to-do list into a ranked one in under a minute. You give every task a letter based on what happens if you do not finish it, then add a number to order tasks within the same letter. Brian Tracy popularized it, and it works because it replaces a vague feeling of importance with a decision you can see.
1A: must do
Serious consequences if missed: a client deadline, a payroll run, a contract that expires today. These come first.
2B: should do
Mild consequences: a non-urgent reply, a draft to review. Annoying to skip, not damaging.
3C: nice to do
No consequence either way: a chatty coffee, an article to read. Do these only if the day allows.
4D: delegate
Anything someone else can do frees you for A work. Hand it off and track it lightly.
5E: eliminate
Tasks that add no value. Cross them off and do not look back.
You never start a B task while an A task is unfinished. That single rule is what makes the labels mean something: it removes the daily negotiation over what to start next, and it stops the easy tasks from quietly pushing the important ones down the list.
Both sort by importance, but differently. ABCDE is a single line from A to E, ranked by consequence. The Eisenhower Matrix is a grid that splits urgency from importance, which is better when you keep mistaking busy for important. Use ABCDE for a fast daily sort and the matrix when the two ideas keep blurring.
A few tasks drive most of your results: find that 20% and give it your best hours.
Pick six tasks the night before, rank them, and work top to bottom one at a time.
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