Try using yellow hi-viz pop up's fished on a zig-rig mate, also try and put them to any features like weed, etc, and don't be afraid to cast them to showing fish! don't use anything to oiliey like pellets as they won't break down properly in the cold water, maggots can be devastating in winter, especially if there is a lot of "natural" food in the lake, don't over do it on freebies if using boilies. Little bags of crushed boilies can help to get a run also, best of luck and tight lines dude!