I also remove the end hooks on all my jigging raps. Swapped out all hooks to red, on all jigs and spoons that I could.
As Tundra Said, glow eyes, flash tape, etc.. Any of my Kenz Hooks (of similar jigs) I take the bead off.
Also whenever I find clearance bin spoons, I'll buy a handful of them and modify them in different ways.. Reshape them, increase/decrease bends, anything to modify the action.. I haven't created any miracle jigs yet, but hopefully one day come across an irresistible action of my own creation!