One of the main things I've been using scents for lately is to help me focus on my writing. (I've had some very bad writing years, got trapped in not being able to concentrate because of anxiety and loss of self-confidence, and the best way around that for me has been training myself to use small sensory cues as messages that it's writing time. Whatever works?)

There's a snake-king in my WIP, so I was really happy to discover a solid perfume called "Serpent," which not only smells really good but also evokes some of the moods/themes of the story. It's not the perfume any of my main characters would wear (I think Hallie wears Marc Jacobs Daisy, Thea showers with bergamot soap, and Isabel... hm, Juliette Has A Gun Midnight Oud is the perfume she'd want to smell like, but I doubt she has a bottle) but it's great as an evocation.