Get an Internship
You can draw and make all the dope renderings you want in college, but nothing will change how you create like an internship. You go from making beautiful illustrations to making terrible samples that you think are the greatest shoes ever. Then in comes a seasoned designer and shows you how to take that sample you have and turn it into a finished shoe. An internship gives you exposure to how products are really created. While you won't learn everything, you will learn more than you ever thought you could. Plus, you will get an inside eye to not only the creation process but how product is selected, marketed and retailed. An internship may be the most important step to getting a footwear job.