For a two week taper, I would be looking at reducing my 'normal' training week by 50% in the first week and then to 30% in the second week. I think the tip is not to reduce the intensity of the training but just to reduce the distance, so that you keep yourself sharp. If the race is on a Sunday I would make my last training run on the Thursday, I would take a rest day on the Friday, then a very easy couple of miles the night before the race.
Gareth