There are times to add new pieces...to make investments, to research, to spend a couple hours in the dressing room. (Turn, turn, turn.) And then, there are times to get creative with what you already have, and improve your wardrobe and own personal style without spending a single cent. GQ offers some solid tips for free ways to work with what you already have. Some are skill-based, such as learning how to sew (ManMade alert); some are about switching up components of your standard sets and outfits, and others are more inspirational, inviting you to try something new.
Not every idea will apply to every guy, but the info's free, the tips are free, and the results are free, so there's no reason not to check them out.