You can last a surprisingly long time out there without eating, especially if you’re in good shape, but at some point you’ll need food. Given the dangers of eating unknown plants, fish may prove to be the most reliable meal. Making hooks and nets is a tricky business, but you can turn any stiff and straight sapling into a forked spear by splitting one end with a wedge and sharpening the points. Improve your chances of getting fish into striking range in a river by building a weir: a simple rock formation that funnels fish into an area that’s hard to escape. And if you do manage to impale a fish, do not raise it out of the water. Instead, hold it down against the bottom where you can grab it with your other hand.