Please choose the correct ending to complete the given sentence: Health: [header] How to feel alert when you wake up in the mornings [title] Establish a healthy sleep routine. [step] To be alert in the morning, you need, for one thing, to get deep and restorative sleep. Try to set a routine.

Ending1: Set a general bedtime and stick to it. [substeps] Throughout the day, set your alarm and stay at it throughout the day. Ending2: For example, you may strive to get to sleep around one am, and eat a big breakfast, or go to bed and wake up at 7 am. [title] Try to wake up earlier, but stay in bed. Ending3: Go to bed early and get up at a reasonable hour. Aim for between 8 to 10 hours of sleep every day. Ending4: When you wake up each day, have a morning routine which really wakes you up. This means get up more frequently or take up a new routine.

Answer format: ending1/ending2/ending3/ending4