To Buy: 
Buy fresh bunches or grow your own in a pot.  Mint will easily develop roots if a piece of stem is kept in a jug of water.
To Store: 
Store fresh mint in damp kitchen paper in a plastic bag in the crisper section of the refrigerator for about 5 days. 
Store dried mint in an airtight container in a dark, dry place - keep it away from other dried herbs as the flavour will take over. 
Tips & Tricks: 
The oils in mint are in glands in the leaves. Crushing them releases the oils and the pleasant, strong and soothing flavour. Add a little mint to meatloaf - not enough to be recognised - for a fresh lift.  Add torn fresh leaves to a fruit salad or green salad.
Cooking Tips: 
Combine fresh mint with parsley to make fatoush and tabouleh. Add it to natural yoghurt for a refreshing accompaniment to curries. Mix in with couscous. Serve with lemon and water in the summer. There are so many things to do with mint it's always worth having a pot growing nearby.