Preparing for Business Attire

During college, it is really difficult for our bodies to accept formal wears. You will become a laugh of the town if you wear business attire when everybody else is wearing casual wear which are in with fashion. Well eventually after college, we would have to wear those clothes that we've avoided all along. How do we train our bodies to accept this? I've got one tip (for college students):
1. Mix formal wear with your casual wear. You can combine jeans with a polo (with trendy designs), and gradually shift those designs to lesser and more formal ones. The jeans gives an impression of a fashionable attire.