There is no true rule of thumb when drinking whisky but there are a few things to keep in mind to make the experience a lot more enjoyable. It should be pointed out that if the general rule of thumb is not observed there is still no reason not to enjoy this wonderful spirit.
You should never put ice in a great dram as it kills the taste and aroma, however, some do prefer it this way. The glass that is originally designed to accept a fine malt whisky is very wide at the top and gently slopes in for the very reason of not comfortably accepting a bed of ice, as the intention is to steer away from this practice. This glass is by most called a tumbler.
When purchasing great malt the price, like many things, will indeed reflect the quality you get since with scotch, you tend to get what you pay for. There are a variety of alcohols available for a cheap price in which you can get a buzz, however, fine scotch should be sipped and enjoyed.
Good malt is not an appropriate mate for a mixing party and does not really take kindly to a soda. It tastes much better with simple bottled water. The best pairing with great malt would be of the mineral water variety bottled...