Here are few notes which i have made personally or are inspired by some references.
1. Reduce the usage of air conditioning by making an organic roof garden. Water the plants every day, smell the fragrance of flowers, and watch small creatures flying around! That is so beautiful and plus good for earth.
2. Drive an eVehicle like eCar, eBikes. This will both save your pockets and reduce pollution from environment. Also for other vehicles drive your vehicle in Economy range, Stop the fuel engine when waiting for long at traffic signals. This will save fuel up to 20%. It will save your pocket and environment too..!