For summer energy savings, set your thermostat to 78°F at home, raise it 7-10 degrees (85-88°F) when away, and 82°F for sleeping. Adjust based on personal comfort. Use ceiling and floor fans to circulate air, blackout curtains to block heat, and change air filters regularly. Avoid cooking during peak heat and try a DIY ice bucket fan for extra cooling in small rooms. These steps reduce HVAC workload and energy costs.