First, put something down
Start with your phone. Put it on a shelf, in a drawer, or simply somewhere that isn't your hand. You don't have to promise not to look at it all evening. Give yourself five minutes in which nothing needs to be answered. Your bag and keys can go down too.
This isn't a new task to perform well. It's a brief pause between the part of the day that asked things of you and the part that belongs a little more to you. If the room is untidy or dinner isn't planned, the pause is still allowed.
A little warm water
Wash your hands slowly enough to notice the water. Work the soap between your fingers, rinse, and use a clean towel. Such an ordinary action can make a surprisingly clear dividing line: you were out in the world, and now you are here.
If a shower is already part of your evening, let that be the ritual instead. There's no reason to fit both into five minutes. Choose the version that matches your actual day, including the days when you are tired and would rather do very little.
Change the light
Turn off one overhead light and switch on a lamp. Open a curtain if there is still daylight outside. The room doesn't need to become a scene from a magazine. A different source of light is enough to make the same furniture feel a little less like a place where work happens.
If the weather suits, open a window for a moment. Notice the air rather than checking the forecast. On a cold or noisy evening, leave it closed. A useful routine should be able to change with the season and the room you're in.
Something for skin, something for the room
Massage a small amount of body oil into your arms or apply hand cream. Let the familiar movement be the point. You do not need to add several products or wait for a special occasion to use the things you enjoy.
If you like candles, light one on a stable, clear surface where you can keep an eye on it. Keep it away from curtains and anything that can catch fire, and extinguish it before leaving the room. If a candle isn't practical, a warm lamp can do the atmospheric work just as well.
Leave a minute unfilled
Put the kettle on. While it heats, resist finding one more small job. Stand by the window or sit in the chair you usually pass on your way to somewhere else. Let the minute remain a minute rather than something to optimize.
There is no requirement to meditate, journal, stretch, or have a profound thought. Tea can simply be tea. Silence can include traffic, a neighbor's television, or the washing machine. An evening ritual doesn't depend on making ordinary life disappear.
After five minutes, carry on. Cook, call someone, read, or do the practical things still waiting. The routine has done enough if it gave the evening a beginning. Tomorrow it might be shorter. Next week it might look different. Keep the part that feels useful and let the rest go.