I don't know how ambitious you are, I'm just in it for personal satisfaction - I had a 33 kph average on a flat 40K course this year with which I am satisfied.
Where are your long rides? How long is long for you?
I just ride long.... as long as I can. I love the bike best, so I do any distance I can - 100, 120, longest to date is 160 km. How about another couple long rides, high cadence, flat.
Other than that just go with the flow, you can't catch up on the training you did not do this year.