Marc Andreessen Three-By-Five Card Triage

Sort daily commitments into three to five core priorities using the Marc Andreessen productivity routine.

5 time blocks, 20 minutes in total.

Time blocks

Brain dump active commitments: 5 min
Write down everything currently demanding your attention on paper
Filter for three to five critical priorities: 5 min
Select the most critical tasks that must get done tomorrow
Write top items on index card front: 3 min
Keep the list strictly limited to three to five actionable items
Log anti-to-do wins on card back: 2 min
Flip card over to record unscheduled tasks finished during the day
Review completed work and tear up card: 5 min
Acknowledge progress on both sides of card and discard it

About this routine

The Marc Andreessen productivity routine relies on a simple index card system to maintain focus and prevent daily overwhelm. Entrepreneur and investor Marc Andreessen developed this method to counter overwhelming to-do lists that create anxiety without driving progress. By restricting daily planned actions to a single 3x5 card, the system enforces strict prioritization.

Before sleeping, write down three to five high value tasks on the front of a fresh index card. These represent the absolute priorities for the coming day. During work hours, keep the card in your pocket or on your desk as a constant visual anchor. As unexpected urgent tasks get completed throughout the day, turn the card over and write them down on the back. Andreessen calls this reverse side the anti-to-do list.

At the end of the day, review both sides of the card. Seeing the accomplishments on the back provides a clear psychological boost, showing that productive work occurred even when unplanned interruptions happened. Tearing up the card at night creates a sense of closure, leaving a blank slate for the next session.

Why this routine works

Prevents task overload by strictly capping planned priorities at five items
Captures unexpected progress using the anti-to-do list technique
Provides evening psychological closure by destroying completed cards

FAQ

What is the Marc Andreessen 3x5 card method?

It is a task triage system where you write three to five core priorities on the front of an index card at night, and record unplanned completed tasks on the back during the day.

What is an anti-to-do list?

An anti-to-do list is a running log of useful tasks you accomplished during the day that were not on your original plan, helping preserve momentum despite interruptions.

Why tear up the index card at the end of the day?

Tearing up the card provides psychological closure, acknowledging the day's work and clearing your mental slate before planning the next day.

Sources

Pmarca Guide to Personal Productivity, Marc Andreessen