I've been playing lots with some mods that already have insectigration (insect integration) and I thought it would be fantastic to have worm bins that work with the worms in primitive survival. My current idea is that you would place plant matter (lilypads, seaweed, ferns, flowers etc), sticks, and a peat block or infertile soil block in either a hole or a cauldron of some sort, then add a few worms on top. This would then become a worm bin that, if periodically watered and mixed up (with a hoe or shovel) will produce more worms and fertile soil! Add more plant matter or rot every now and then to top it up, and you have a self-contained bin to get rid of annoying items (like the lilypads and rot) as well as get something nice out of it
Another idea similar to this one would be beetle/larvae farming based on this youtube video i love, as a way to create a constant source of protein and feed for livestock/traps X3