Extremely high
10–20 min outside, no sunglasses, within an hour of waking.
CostFree
Time10 min
EnergyEffortless
ImpactExtremely high
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Goal
Attention is downstream of sleep and light. The things sold as focus aids rank last here.
5 scored on impact, energy, cost and time — the same formula the whole site runs on. How the scoring works.
10–20 min outside, no sunglasses, within an hour of waking.
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Wake within a ±30 min window, every day.
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