I nap when tired but analyze: should I stay awake to build sleep pressure? Map the adenosine accumulation: staying awake increases sleep pressure. Calculate: if I powered through afternoon fatigue, would nighttime sleep improve? Show me the pressure building: these hours to stay awake despite tiredness. Give me the guidelines: when to push through vs. when to rest. Include: whether fighting daytime sleepiness helps nighttime sleep, how much pressure is optimal, and signs I'm overdoing it.