Number one would have to be my faith. That is something that gets me through the good and bad times. I may not know what is going to happen and it may not provide me all the answers to life's questions, but it is something I lean on as a source of encouragement.
The second thing would have to be my wife, hands down. She is my rock and my life would be pretty miserable without her. No question in my mind she makes my life 100 times better if not more.
Finally I have to pick my dog. She is just about the best. She has her quirks and goofy habits, sometimes she drives me crazy, but I love her to death. I can't imagine the "joy void" I would have if something were to happen to her.