I do a lot of coasting to get my high MPG's. In the rolling, rural roads where I get my best mileage (since I don't have a lean burn ICE that gets its best on the flats) I can spend about half of my total driving time coasting the downhills. When coasting, I just press down on the clutch and hold it down while leaving the gearshift in gear until I need to apply power, then I just release the clutch while nudging the accelerator to match RPM's for a smooth engagement. This way there is no safety issue since I can apply power when needed in a fraction of a second. And with 356,000 miles on the transmission and with the original clutch, it obviously isn't hard on the gears. The only time I will coast in neutral with the clutch released is when I have a long (over a mile) downhill coast on a fairly straight road in a low traffic situation. Also do a lot of coasting in urban driving when approaching traffic congestion, lights, stops, etc. Basically I coast whenever I encounter a downhill section of road where my vehicle will maintain its speed and whenever I have to slow down for lower speed limits, traffic, traffic lights, stops, and curves. As much as possible I use coasting rather than braking (friction or compression) to reduce my speed when it needs to be lowered. While driving on familiar roads, I can use the speeds that my vehicle attains while coasting to determine the density altitude for that particular drive so I can get an idea of how good my MPG's will be for that day since I don't have a game gauge. Also an unusual drop in coasting performance will also alert me to a tire that has dropped in pressure.