I absolutely adore fishing in the Winter time. Although I've spent countless nights bivvied up fishing for Predators, I never really felt I was doing myself justice at that crack and rarely were real red-letter days/nights the case (although I managed the odd one or two....). This last few years I've concentrated on being a lot more mobile and fished from dawn til dusk, a shorter session but with maximum effort.
With a warm suit (anything Sundridge is good), some moonboots and the minimum of tackle you can walk miles in a day and visit numerous swims. Once you get away from the access points and make yourself at one with the surrounding nature, you will be surprised at the sights you may encounter in addition to the fishing. As well as catching Pike and Zander in sub-zero conditions, I've enjoyed catching shoaled up Roach, Perch and Skimmers and often in absolutely minging conditions, snow, ice and driving sleet et al. The key is finding where they hide out, where I fish vast area's will seem devoid of fish but then you can find a feature (usually somewhere away from it all) and you can literally walk across the backs of the fish to get to the other side. You'll soon find that under circumstance like this, the fish won't be too shy of biting!
Good luck mate and prep the night before to ensure you don't forget anything. Also, take a torch with you as if (as often is the case) you get a run just before dark, by the time you land the fish, unhook and photograph it if it is a good one, it'll be dark when you pack up your kit.
The winter is a special time of the season with every fish you catch being hard won, you'll maybe find you appreciate each one a little more!