I don't drive with economy in mind, although I do try to minimise my use of the brakes by reading the road and anticipation. On the motorway, I prefer to cruise at 'outside lane' speeds, and my 26 mile daily commute is a mix of 60/40 motorway and queueing traffic. I enjoy the lively performance available from my tdi90.
I get around 50-52 mpg and always have done, in the 10 years I've owned the car. The climate control seems to lose me around 1-2 mpg, which is, I think, a fair compromise for a dry and condensation free interior even in the cold and wet months we get in Manchester.
I have been told that high torque at low engine speeds is the way to kill the DMF, so I don't use the highest gear at lowest speed technique, and I do find the car feels happier used between 2000-3000 rpm if you are using the performance available.
So, an interesting comparison between 'real world' figures using the car's capabilities, and driving with serious economy in mind.
Just as a matter of interest, I once drove from Manchester to Biggin Hill airport in Kent, and back again in a day. According to the trip computer, my average speed for the entire trip was 79mph, and average fuel economy 49.9 mpg. For a c500 mile day trip, I thought that was pretty respectable.