Keep the engine tuned up along with a clean air filter and properly inflated tires and you will save a whole lot more on gas than with all of those "tips" combined.
I am also amazed at how many people will stay on the gas until the last instant then hammer the brakes for that traffic light that has been red for the last 15 seconds. I see a light turn red ahead of me, I immediately take my foot off of the gas and glide. Of course this is when I am driving my Explorer, not the Cobra.
Wayne