I take melatonin at bedtime but analyze: should I take it 2 hours earlier? Map the melatonin timing: peak effectiveness is 2-3 hours after taking. Calculate: if I took melatonin at 8pm for 10pm sleep, would onset improve? Show me the optimal timing: this is when to take based on desired sleep time. Give me the dosing: 0.3-0.5mg is often more effective than 3-10mg. Include: whether I'm taking it too late, correct dosing to avoid grogginess, and if less is more.