I set them up the night before, and keep the pile on my nightstand. I have a drawer for all the ones I'm not using that day, and they go in no particular order.

They go in the proper place because when I finish a chore and remove the bracelet, I think of removing the bracelet as the reward. Putting it in the drawer is the last step to completing the chore, so the laundry isn't done until that bracelet is in the drawer.

So the nightstand and the drawer are the only places they should ever be, unless I'm wearing them, and the nightstand is only when I set them up for tomorrow, so really just that drawer. I also keep new tags and a pencil in there so I can make neww ones without leaving the spot.

Now I'm not perfect and I do leave them around occasionally, like forgetting them on the bathroom counter, but because I always remove them in the same sorts of places, they don't stay missing for long.