it's cold out now unless you live with warm weather year round. But this chill in the air doesn't mean you can't still focus on your modeling. I think even posing while wearing a winter coat is a good idea. But make sure the coat doesn't drown you and still shows your shape and personality.
Focus on catalogs, the smiles and the energy for the shot and pose.
Also the winter time is a perfect time to start getting organized. Time to revamp your portfolio and images. Go through your recent shoots and decided which you like, which can be cropped and used? Which could be printed to be in a portfolio? Also think about what you like and don't like about the shots you took and work on improving that in your next shoot. The best way to judge yourself is to look at yourself. A good photographer can catch you and capture you usually within one shoot, but sometimes it can take up to 3-4 to get a quality comp card and book together. It might sound routine but Modeling is about images and petite models need to focus on that because to get work we have to work on making our height that last thing that is noticed.