This is one of those tips that you hear about, never think you'll use and then, in a pinch, it works like a charm. You're just about to leave for a date/job interview/wedding and you pull some dress shoes from your closet only to find them scuffed and dull. You might think to yourself, a true gentleman would've had them shined days ago. Nope. A true gentleman would know how to fix it.
Peel a banana and remove any stray, white stringy pieces of pulp.
Rub the peel's inside on your shoes (suede and wing tips excluded) in a circular motion. Focus on the toe, you needn't worry about the whole shoe.
Using a paper towel or handkerchief, buff to a shine.