Gradually introduce new changes to your new home environment. You and your partner should agree on what will change with your new family. This will require a big adjustment to be made by the children. If you rush in with foreign furniture, bits and pieces, new rules, new routines and, of course, you (as the new dad), you threaten the childrens' comfort and security. Do it one step at a time and let the kids get used to the new ways a bit at a time.