To Buy: 
Fresh olives are sold by colour - usually black (kalamata) or green. 
Olives can be marinated in garlic, chilli, preserved lemons, and a variety of other herbs and spices. 
Buy from a good deli and ask to try one first. 
Avoid black olives in jars from the supermarkets. 
To Store: 
Store in the fridge for up to 2 weeks and serve at room temperature.
Tips & Tricks: 
Buy an olive seeder - it's a fun gadget to use and makes deseeding olives a breeze.
A serve of olives is equal to about 7 olives.
Cooking Tips: 
If the olive is too salty, bring them to the boil and drain the water off before using. If adding olives to a slow cooked casserole, add the olives at the end of the cooking process so they retain their shape and flavour.