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Every decision draws from the same limited pool of executive resource in the prefrontal cortex. By late afternoon the pool is drained, which is why choosing between two takeout options can feel harder than the strategic call you made at 9am. The standard fixes all ask the depleted system to work harder. A scent cue doesn't, which is why it can reach you in the state where "just decide" can't.

The freeze that happens when you look at a full task list isn't a productivity problem. It's a nervous system response — each pending item registering as a separate threat signal, producing a shutdown rather than a prioritisation. The fix isn't a better system. It's a state change first, then the list.