There's an old saying that the best place for an instrument is either in your hands or in the case. If you talk to a luthier, they likely have seen it all for repair, from dog chewing to someone falling out of bed onto the instrument (an undignified end given the fact that the uke is a romantic instrument). If you are not playing as much as you should, leave it out in plain sight so you feel more compelled to pick it up and play, otherwise take care of it.
change in temp and humidity are bad for wooden instruments, particularly if the change is rapid. Keep the case(s) away from forced air heat ducts and air conditioners. Don't leave the case in a car sitting in the hot sun, and places like that....fleas and flukes seem to be most tolerant to abuse you wouldn't inflict on a solid koa ukulele.