My friends house always smells really good, how does she do that?

I asked my friend why her house always smells so good. She answered with “I work at pier one…thats how” and smiled. I am still really curious how her house smells so good though. I mean it’s not a clean smell, its almost calming and relaxing. I’ve tried sprays and plugins and different scented cleaners in my home and they do freshen things up but I feel the smells fade fast and don’t give me the same feeling I get when I am at her house. Any ideas? Does Pier one or other stores have certain products that do this?