How you end your night writes the first line of tomorrow.

The last hour before sleep sets the conditions for the next morning, through what you did with it and how much of it you used up. Tomorrow begins from whatever state you leave behind: the room, the sleep, the last thing you looked at. That handover happens whether or not you manage it.

Pick a rough time to stop and one thing you will not do in the final half hour. Set out whatever the morning needs. It is a small amount of effort spent exactly where it buys the most.