Ok, I won't be able to answer this for every stylist out there.
But in general, a lot of my job, is before a shoot. Day of is the fun part. And then I still need to wrap up a few days after the shoot doing returns.
So if you book me for a day, I've spent about a week at least on it.
I like to get reference images from my clients. I like to have an actual conversation, by phone, or a face to face. I like to build the concept, put my own spin on it, while still maintaining the clients vision.
I research, read, window shop, scout, follow trends & designers, go to fashion shows, meet other stylists, business owners, and am constantly networking.
My job is a lot about research, skill, and then style.
Anytime I am not working on a specific shoot, project or event, I am still reading, and watching and in general keeping my head in the game.
As for prices those tend to vary. But I like a good old fashioned day rate. One that includes my running around. Sometimes there are deals made. But considering my agent books me a lot of work, not that often anymore.
The rates vary someone on what the shoot is for, whats needed, how many looks, how intricate etc.
Everyone works differently, that's my basics.
Have a great weekend!