Fishing bluffs is very effective in the winter. But you have to learn to read the bluffs and find the best sections and then duplicate that around the lake where possible. Reading bluffs is just like learning to read any other feature on a lake. Bass relate to bluffs in certain ways at certain times of the year but they become especially important in the winter and prespawn months.
Jason Sealock talks about what is different, and approaches to keep your bait in the strike zone longer and catch more bass.