Open the blinds on the sunny side of the house when the sun is shining and close them as soon as the sun goes down to retain the solar heat. Close the curtains on the shady side of the house. If you don't have curtains consider installing some.
On the street
I do actually, especially lately with the nice weather. I’ve been seeing how long I can go without turning on the heat, but it looks like I might be about that time.