Not sure about which spices to use in what dish or for what flavors? Lucky for you, Dean & DeLuca just published their 2011 Spice Guide! Lots of information and its FREE!
What are your favorite spices to cook with? My personal favorite is Cayenne Red Pepper. It gives any dish a nice kick. Now I know this may sound weird to some, but my latest favorite is to cover a filet of salmon with cayenne (with a some hot red pepper flakes on top too), and bake it. The filet just soaks up the spicy flavor! Delicious!