I have actually been complimented by several people on how nice my house smells--just last week a coworker of mine was over, and she has no pets, and she couldn't believe that there was no dog smell!!!
I have plug ins and candles all over, and I spray febreze on the furniture, carpets, curtains, and lampshades a few times a week.

I also have a husband who is obsessive about a clean house, so that helps too