If you mean AW? Generally on chargers I have around, one tends to be a day watch, one a night watch, and depending on mood, exercise and weekend. But usually the first two are swapping. The bands are a whole other mess.
I have separate containers for my 42-45 and 38-41 watch bands; I keep the 'watches' for each in those. That was everything is protected and in one place.
One is on the charger(Series 4) and the other one on my wrist (series 7)
When i go to bed i swap the watches to get sleep tracking. In the morning i swap again for the day.
Apple Watch series 0 is in its box.