Don't need to be so complicated.

1) Avoid roads with traffic jams
2) Be gentle with your footwork
3) Use light and small cc cars

Bear in mind you may be spending more money by considering the methods in your 1st posting above to gain perhaps minor or negligible savings in fuel consumption. If you want to go to the extreme : -

4) Turn off engine when at traffic lights for long periods
5) Don't use air-con
6) Side mirrors folded to minimise drag (you won't be able to use side mirrors anymore) - negligible effect to FC anyway

In the end, it is a better idea that you ride a bicycle to work, provided your house is near to your workplace.

1. Motorcycle
2. Find a new home nearer to your workplace, perhaps walking distance if possible.