Lure types are generally food lures, gland lures, curiosity or call lures. There are a lot of good lure makers mentioned plus Down South Trappers and a few others. Obviously gland lures are going to work better in the December-February time frame. Don't get hung up on digging a bunch of dirt holes, learn how to punch in flat sets with and without added attractors (a large piece of railroad slag works well and you can even smear the paste type baits on the bottom of it). Work on bedding your traps solid, they must not shift when your press down on the frame ends or jaws, as quickly as possible. Then focus on blending the traps so well that there's no sign that anything is there. A small whisk broom works well to sweep dry dirt from outside the pattern over it to help it blend.

Don't overlook castor as a curiosity lure, a lot of bobcat lures include it. But it'll catch a coyotes attention too. Dobbin's Backbreaker is one of the best.

"Cull" is just another four letter word...