Yeah, that's pretty much the big thing. If you're following any kind of steps as far as temperature changes, you'll want to check every couple of hours when you make the change to make sure it's not going too far in any particular direction. (Of course, if you have a good thermostat, this is not a problem. If, like me, your fridge only has a "moderately cold" or "freezing" setting, this is gonna be an issue).
The other thing is to make sure your airlock still has water in it, depending on how long it's in there.