Recessed light fixtures can poke into the attic insulation and create a pathway for air leaks. Caulk around them from below with high-temperature flexible caulk.
Ceiling fans should rotate counter clock-wise in the summer (to generate a breeze downward to cool you off) and clock-wise in the winter (to cycle the warm air that rises to your ceiling.) Do not be afraid to run your ceiling fan in the winter. You can expect a 10-15% savings on your heating bill. You can save up to 40% off your cooling bill in the summer.
Before you buy a fan, consider the size of the room you want to cool. A 52-inch fan is appropriate for a room that's 230 square feet or larger, while a 42-inch fan is appropriate for rooms ranging in size from 150 to 229 square feet.