Go for a little walk down the memory lane, and make a folder with pictures from the past – photos of yourself that you like the most, dresses you often wear, etc.
That gives you an idea of what you want, which means you should probably reconsider your closet, chuck everything you do not need, and build further according to your style. Work on adding to those looks, and how you can align them with the current fashion trend. Like adding a scarf, a piece of jewelry, boots, etc. After all, it can be quite boring to wear the same kind of clothing.