I think I did a welcome in another thread.
Work on flexibility exercises. You will be amazed what they will do for your game when spring comes. My other suggestion is if you set up a swing station to use, you should also set up a video camera or iPhone to capture your swing from down-the-line and face-on. Have your local instructor or pro check them from time to time. If you are doing something wrong, and you do it for 6 months, you could end up worse than not doing anything over the winter.
Great suggestion. Thanks Kenny. I'll start my flexibility/mobility and strength training/conditioning next week.
Totally agree. 6 months of reinforcing bad habits would be pretty devastating. I've found a pro in the UK - Dan Whittaker. He coaches Rick Shiels and Peter Finch. I've been in contact and will try for something like monthly lessons.