Lots of different things, depending on how I'm feeling.
But ultimately, I'd probably just use the power for more cosmetic purposes. For example, if I wanted a certain hair length and style for the day, I'd be able to just have it. It would also be like having an infinite wardrobe and unlimited outfits. Just shapeshift into a version of myself wearing whatever it is I want to wear.
Would also be useful for becoming an actress.