Aluminum foil—the one in the drawer next to plastic bags and forgotten rubber bands—is said to be the secret trick for improving—strengthening—your Wi-Fi signal. Scientifically speaking, it works like a reflector: bouncing the waves where you want them and taking them away from those you've already given enough internet to (read: your neighbors). In practice? Mixed. Users report everything from "Wow, that works!" to "Eh, same as before." But the trick is fun, quick, and almost free—which is more than you can say for most modern technology.
