To Buy: 
Fresh galangal should be clean with a rosy glow, and should snap easily when broken.  Dried galangal slices and powder are available from Asian or spice shops.  Good quality galangal powder should be a pale, creamy colour.
To Store: 
Store fresh rhizomes in the crisper section of the fridge. Dried galangal should be kept in airtight containers away from heat and light.  Dried slices will last for up to 3 years, while the powder should be used within 18 months of purchase.
Tips & Tricks: 
Add grated or finely chopped fresh root to Asian dishes, especially Thai food. Dried slices are useful in clear Asian soups, and the powder is a good substitute when fresh is unavailable.
Cooking Tips: