Using neutral when going down hills is illegal in some states. I used to hypermile, in fact I helped start one of the best hypermiling sites on the internet. I wasn't as good as many on the site because I avoided the "unconventional possibly illegal" techniques. I pretty much stick to driving between the minimum speed limit if there is one, and the speed limit.
I do try to avoid stopping and will try to time the lights so they turn green when I get there.
I used to turn off my engine while I was driving. I DO NOT turn off my engine anymore after I heard of one guy doing it while turning into his alley and almost hitting a family.
My mileage in the summer is about 60mpg in my hybrid.
I'm supprised you only got 247 mpg going down hill. They hypermilers I know would have gotten infinite mpg because their engine would be off.