To Buy: 
Buy dried chillies in whole form, chopped pieces (flakes) or powder.  Make sure packaging is secure, as chillies are prone to insect infestation.
To Store: 
Store chillies in airtight containers in a cool, dark place such as a pantry.  In extremely humid areas, keep chillies in the fridge.
Tips & Tricks: 
Add dried whole chillies to slow-cooked dishes such as soups, stews and curries.  Flakes and powder can be added to virtually any food where a little heat kick is desired.  Using whole, dried Mexican chillies such as Pasilla, Mulato or Ancho, shred very finely with a very sharp knife, and pile a little "nest" of shreds on icecream.
Cooking Tips: