You might start by covering the storm door with a decorative window film available at home improvement stores. (tulsapetsmagazine.com)
They do have some stick - on tile and faux wood panels that is sold at home improvement stores (the brand name of it escapes me right now, sorry!). (thepaintedhinge.com)
Another option is a rewards credit card; some cards offer extra cash back on purchases at home improvement stores during certain times of the year. (creditdonkey.com)