It’s so basic that you think it wouldn’t work, but you’d be surprised. All you need to do is stand in a stream and hold the bottom of your t-shirt out from your body to act as a net. Then, spit in the water collected there.

Minnows and other tiny fish will get confused and think it’s food, and then you use your shirt to trap them. After that, it’s up to you; eat the minnows or use them as bait for bigger fish.