As you read the Sunday ads, pull out pictures of any outfits that you feel really express your personal style. Sort them into four piles: leisure, casual, business, and social (the four lifestyle segments). Make yourself a collage for each.
Clearly, you may need to supplement the ads. Catalogs are my favorite. I just don't recommend using magazines, they are full of crazy stuff that I never see in the stores. Not that I want to.