As with screws, a little paraffin or beeswax will make driving certain nails, especially casing nails, much easier. If you are driving a cement-coated nail, always keep it going all the way once you start. Friction heats up the nail's coating and if you stop midway it cools down and tries to glue the nail in place.
Using the properly sized room air conditioner is important for comfort and efficiency. Buying too large a unit will chill the air without removing humidity, leaving you feeling cold and clammy. Talk to your dealer to determine the right size for your needs.