As others have said, KEEP CORDS OUT OF REACH. My fiance was so mad when Chase chewed through his phone charger cords, and his electronic cigarette cords. My shoes have also been a victim of Chase's chewing habits, so put them up in the closet or behind closed doors. Also baby gates are really good for keeping them out of certain areas of the house or certain rooms. We use them for the garage, upstairs, and dining room.
Since you haven't gotten your new pup yet, I will let you in on a little secret.. Corgis are aggressive chewers. If you buy stuffed toys, don't pay more than $1 for them, because they wont last very long at all. Even the rubber toys get chewed up at my house and then I had to pick up all the little pieces. After these toys get a hole in them, throw them away because ingested stuffing and rubber WILL cause intestinal problems. I bought Chase plenty of chew toys especially for teething puppies and when I caught him chewing on something he wasn't supposed to, I corrected him and replaced the item with one of his toys. "This is not for you to chew on. Here is your chew toy"
Good Luck preparing for your little one. This is a great site for ANY of your questions!! I post on here all the time with questions and advice.
Also, my mother would like me to add that if you try the baby gates, don't buy the plastic ones. Buy the metal baby gates, ours have doors so you don't have to step over them.
My mom also suggested that you get down on your hands and knees in each room of your home and look for things that you could chew on, or would chew on if you were a puppy. :)
This is also good advice.
Basically if you don't want it chewed on, put it behind a closed door somewhere. Anything is fair game to chew on as a puppy, until you have time to set the boundaries. Puppies are just like babies and they explore with their mouths, so it all looks great to chew on. I once knew someone who confined their new dachsund puppy to the bathroom while they were gone and they came home to find all the baseboard eaten off their walls of a brand new house. Moral of the story: ANYTHING they can reach they will chew on! (And our Newfie puppy pulled up the linoleum in the basement!)
The reason to use a leash in the house is 1)it helps teach the puppy that a leash is OK and nothing to fear and 2)it teaches the puppy to stay near you and watch you for signals as to what is going on, rather than going off exploring on its own, and 3)it puts you in control instead of the puppy.
Keep puppy in an ex-pen on linoleum or a non-carpeted surface, never allow him/her out of your site and/or keep it leashed to you at all times when not in the pen. Keep the pen away from walls and firmly locked. Keep ALL garbage cans behind locked doors and out of reach. Many corgis on this forum have died from getting into bags left in garbage cans. You can have a fairly messy house and have no issues as long as puppy is always kept under close supervision. Franklin was never much of an issue for me as he was crate trained and I kept a close eye on him, Kirby is a terror and has forced me to put ALL of my stuff (books/chargers/chords/etc) about 3+ feet off the ground and even that hasn't helped much as he climbs and escapes. I think a young pup who has been trained to stay in a crate or pen will be much easier to keep confined though. Oh, and toys toys toys to keep puppy busy!