For me; doing focussed, structured Wattbike sessions of 1 to 2 hours, means that my road rides at this time of year are when it is decent weather, and are relaxed and enjoyable.
I am fortunate that my local leisure centre has well led, structured Wattbike sessions. Doing 2 hours in a group, with a bit of banter in the recovery bits, is much easier than doing the same on your own.