My sister and I recently went to a seminar, which was aimed at helping business owners effectively reduce their monthly costs. It talked about making smaller changes, in order to have bigger results in the long run. One of those things which was mentioned was adding tint to the windows. This helps you save on your electricity bill, since it will take less time to cool a room in the summer, and warm up a room in the winter. As soon as we left the seminar, we started looking into solar window film to add to our windows.