For YEARS I drove cars with no power steering, no power brakes, no power windows, no power seats, no power mirrors and no power.
Me thinks some of you are just weenies. Lol!
As to the original post; I've been coasting in neutral (clutch in) for as long as I can remember. It SUBSTANTUALLY increases coasting distances and has probably been my most effective tool for increasing my average mpg's.
I'd love to see a comparison between coasting in gear with fuel cut vs. coasting in neutral for a set distance/time; say 1/2mi coast coming to a stop (an easy feat to manage in daily driving). Use the 'neutral coast' as the baseline since the coasting distances are so far. For the 'fuel cut'; coast down to a set speed (maybe 1/2 your original cruising speed?) and then maintain it so as to arrive at that stop (1/2mi away) in the same amount of time as the 'neutral' test (to help eliminate 'average speed' as a variable; you could coast the entire way but the 'fuel-cut' car would take a LOT longer to get there) I'd be really curious to see which is the more efficient coast-down method.