If you’re a fisherman, then you are in constant need of worms. While running to the local grocery store or gas station is an option, it isn’t always the most convenient or the cheapest!
So I also use Cardboard Boxes Method
Probably the easiest way to gather earthworms is to simply leave a flattened, wet piece of cardboard out in the yard overnight. This will attract the worms to the surface (for several reasons) and when you remove the cardboard, there will be loads of worms!