"Thai style" wire inline method feeders. Replace your sinker with a method feeder, cover the feeder with dough ball or bread crumbs, and hold on. This rig is virtually unknown in America, but it is very effective. It basically chums and calls in fish while you wait.
Feel free to experiment with fancy rigs, but be clear, this rig works just great when bottom fishing for species such as catfish and carp – no modifications necessary!