I just ride normal 19mph
I dont throw quite so many hills in over xmas as you need a rest at somepoint and I have done 45 races this year and Im now over 40.
Ive learned a lot about training this year though and I can tell you that taking it easy will not get you any faster. Id say most of us can ride steady for a 100miles but you have to look at what you want to achieve over the year.
So ask yourself what you want to achieve. ?
I ride my bike a lot over xmas simply because its a bit of time off work which I dont have in the year.
So yes steady but I do hill sessions dont forget
So my hill sessions which I have done two of them over Xmas are
20 x 2 min on then freewheel back down and go again.
These are hard and Im confident they have been how I have most improved. At the top of the hill its all I can do to turn the bars and head back down again.
This is the same hill that Dave Brailsord use to have the British Cycling lads do them on a few years ago before they had plenty of money.