If you are using red worms that are wiggling to much just put them in your cooler or ice chest. They won't wiggle as much and are easier to put on. Sculpin are easy to put on using your wormthreader. You can make the hook exit from the mouth or behind the pectoral fin. Half hitch the tail a couple of times with your line and it will stay on better while casting.
Crawdads are also a breeze.
Crack the shell or peel the back off to disperse the scent quickly. Use your wormthreader to make the hook protrude from the mouth, the head, sides or the underside of the crawdad. Once again half hitch the tail to make it more secure for casting or hook setting. If there is I will pay the postage. Now what are you waiting for.