I'm a fan of InStyle magazine http://www.instyle.com/instyle/
I'm a much bigger fan of any help that gets me to that state of fabulosity (Kimora, thank's for coining that word). So when I heard that the magazine's editors created Instant Style, I had to buy.
Although I know what looks good I don't always do justice while shopping or getting dressed (there have been a few fashion faux paux). If your fashion impairment has to do with putting an outfit together, then start turning these pages.
The book's useful layout is full of pictures and explainations on what works for different body types. There are tips on wardrobe pieces that are a must.
These suggestions won't be soon outdated because as every fashionista knows, classic pieces of clothing, shoes and accessories are timeless. Not that your wardrobe doesn't need the occasional update, but if you invest wisely, purchases go a long way.
The book retails for $29.95 at major book stores like Barnes & Nobles http://www.barnesandnoble.com/index.asp but there is currently an online offer for $23.96 and members pay $21.56. Check Amazon.com http://www.amazon.com/ for prices ranging from $19.77 or less for used copies.
Wishing you a stylish life,