The golden rule (when driving) for a ZEN ride is anticipation.
When you know you’re going to slow down, or stop (at a red light, for example), try reducing your speed or slow down as soon as possible while maintaining the speed in order your car continues its course to the object of slowing (or stopping).
For example if you see a red light at a distance, release the accelerator and brake a bit if necessary, as soon as possible, hoping that you can keep a little speed when the light turns green … The idea is to get to the light having lost some of the kinetic energy of the car. Anticipation is key in eco-driving. Caution, do not shift to neutral, the effect on consumption is negligible and that safety is disastrous.