Looking more attractive has many social benefits. In addition to Lookism and social conditioning, people generally get away with more social benefits when they look better.
As a start, checkout the newbies style drill and style attraction switches pages to get a general understanding of seducing with style.
A lot of the advice on GQ and Esquire are catered to the marketers of those magazines. For example, a nice watch that costs you thousands of dollars can easily be replaced with a cool looking leather wristband that costs $10. Remember that style is not synonymous with spending lots of money. It is about having a good eye for expressing your inner self.