This article gives a lot of information on how to store eggs for incubation. In my opinion it goes way overboard in some things but it does give good basic information too, mainly what to shoot for. Get as close as you reasonably can without obsessing over any detail and you will probably do OK. Unless you do something silly like cooking them it’s not a case of they all of a sudden all go bad. The embryo is pretty tough. They can still hatch after some pretty rough treatment but the further you are away from the ”ideal” conditions and the longer you are there the less likely they are to hatch. It’s a gradual thing, not all or nothing.
Texas A&M Incubation site
http://aggie-horticulture.tamu.edu/...e-Cartwright-Incubating-and-hatching-eggs.pdf
I store mine at room temperature and humidity in a spare bedroom. I take the turner out of the incubator, plug it in, and store them pointy side down. I keep them out of sunlight and drafts, such as from vents. I hardly ever keep eggs more than one week before starting incubation.
Some things to be aware of. The embryo is alive in the egg. Your goal is to keep it alive without it starting to develop. They do not have to be at full incubation temperature to develop. The warmer they are the faster they develop. I’ve read different things but my room temperature is normally in the mid to upper 70’s and mine do OK. The mid-80’s would be too warm, they will start to develop. Temperature swings from cool to warm and back are supposedly not good either. A steady temperature is better.
The longer you store them the more moisture the egg loses. That’s why they recommend a fairly high humidity place to store them. I don’t have a high humidity place to store them, it can be pretty low or somewhat high, depending in whether the heat or AC is on and the outside humidity. That’s something that can make it hard to get a good humidity during incubation. Each individual egg can have a different “perfect” incubation humidity. There is a pretty wide range of humidities that work for incubation but you are looking for a good average for the majority of the eggs.
Pointy side down is important. You want the air cell to stay in the fat end of the egg. Turning them is not hugely important the first few days but the longer you store them the more important turning becomes.
That’s the key things for me. Try to keep the temperature fairly steady and not extreme, store pointy side down, turning is good, and the drier it is the faster you need to start incubation. To clarify that, unless you are in an exceptionally dry location like the middle of a desert a week isn’t too bad. Longer than that a higher storage humidity might be good.