Posted: 09/09/2014 at 16:31
It's really only the last few days you want to be taking it very easy. For the rest of the taper you want to be keeping the intensity as before, but you're mileage will be dropping.
Some folk if they are feeling really tired will drop a run during the taper, but for most the noticeable change will be the LSR suddenly dropping from 20 miles or so down to 14 miles or so this week and lower again next week.
I think most common mistakes at this point tend to be over training as much as anything else, particularly if you are new to the distance. There can be a lack of belief in what you've done and a fear that not going out for another 16/18/20 miles is wrong, rather than understanding that it takes time to recover from those runs and there's a good reason why you are dropping the mileage in the lead up to the event.