Moving can be especially difficult on a dog. You're basically ripping them from comfort and safety, and putting them into an unsecured (in their opinion), alien environment. To a dog, home is home because it smells like them; they are familiar with the area, and it's been vetted as safe. Here are some tips on how to make your move a little easier for your companion.
1) Your new house smells just like that: new. There is nothing in it that smells familiar, and for dogs, familiar = safe. Prior to moving, add a few extra blankets to your dog's bedding. The longer they can use these blankets, the more scent they will be picking up, and remember, nothing smells safe like a dogs own scent.
2) If at all possible, a day before the dog is to move in, place as many of these blankets around the new house as you can. Look for areas where you'd like the dog to be, i.e., living room, kitchen, etc. You are basically using these blankets like a doggie air-freshener.
3) When you take your dog into the house for the first time, act normal. If you act abnormal ("Look at your new house! Don't you love it? It's okay, you'll be fine here!" all done in a sing-song voice) then you are only making the new house less of a normal situation. Walk in with your dog on a leash. Keep them on a leash for a while (they'll feel safer). You lead them around the house, not the other way around! Remember, you are in charge of letting them know what's a threat an what isn't!
4) Finally, take it slowly. The house is new and strange. Don't overwhelm them. Allow them to get accustomed to one room at a time before you offer unlimited access to the next room. Try not to get upset if they urinate in the house. They aren't unhousebroken. They aren't trying to tell you they're angry for moving. They are merely trying to make the house feel more like a safe place, and they do it through smell. (You immediately start unpacking and putting your various knick-knacks out - same thing.) Simply take your dog outside. Don't punish. Wipe up the mess and leave the mess outside where you want them to go in the future.
Following these steps will take a lot of the fear out of moving into a new location for your dog. Start off well, and you will be avoiding problems in the future.