when i come to a stop, i keep it in gear until the rpm drops to around 1000, then i shift to neutrual and break to stop.
i don't depress the clutch at the stop light because why? there's no good reason to press it down for 30+ secs. i sometimes even let go of the break if i'm sitting in a flat surface and not rolling forward or back..
if i know the light's gonna change soon, i might shift into first, to get a better start. when i first got my manual i used to have the clurch depressed, but the better i got at it, the less i have the clutch pressed down. esp when upshifting i usually push the clutch down enough to put the gear in, then off i go.
as for keeping the rpm below 2k while coasting then trying to accelerate on a non v-8 engine wastes much more gas than being in a lower gear with slightly higher rpm. that sound engine's making while trying to speed up a low revs is it sucking up gas. i say on nov v-8s, since most v8s have higher torque at lower rpms, and a low redline than a v-6 or a straight 4. so it's less of a stress for that engine to speed up from a lower rpm. as for the fuel economy, have you heard of an efficient v8?