If you're going to indulge, buy a great quality chocolate from a chocolatier. Organic chocolate is also available and quite delicious.
Wrap well in foil and store in a cool place. Chocolate should be kept in the fridge on hot days as the heat will cause the cocoa butter to rise to the surface creating a greyish bloom and altering the texture.
Tips & Tricks:
If the chocolate has been stored in the fridge allow it to adjust to room temperature before breaking it into pieces - it will shatter otherwise.
One serve is 20 grams - only a few squares, so savour it!
To melt chocolate, first use a good quality couverture chocolate and grate it or break it into small pieces. Bring a pan of water to boil then reduce the heat. Suspend a dry glass bowl over the pan and add the chocolate (no more than 500g at any one time). Cover the bowl and leave it for 5 minutes before stirring it until it's completely melted.