It is harder to keep toys separate, however do keep them segregated as much as possible. Each pet should have their own toy box. Sharing would be nice; but this should never be forced.
3) Do not force interaction -
Never force 2 animals to play together, sleep in the same dog bed or share anything. This will happen naturally in time in many cases. Most pets learn to become very good friends, when they are each feeling safe about their environment and they bond at their own pace.
4) Attention -
Whether you have a new human family member or a canine or feline family member, try to remember that your Pomeranian did not ask for a larger family. Your dog needs time to adjust. You can help by making sure that you pay just as much attention to your dog as you did before.
Some dogs may resist at first, but do try to have enough enthusiasm for both of you. You may opt to take time out for a favorite pastime (a trip to the dog park, a hike in a favorite spot, etc.) or you may want to take on a new adventure together (checking out a new outdoor market, strolling the aisles at a pet supply store, etc.)