Cantenna to the Rescue!
You're in the middle of a six-mile (9.65-kilometer) trek up the side of a mountain when your cell phone signal vanishes, taking your mobile hotspot or your WiMAX connection with it. If you've packed some Pringles, a few bits of hardware and some tools, you may still be able to save the situation.
Do a Web search for "Pringles can antenna," and you'll find multiple home-brewed solutions for creating a device to boost your WiFi signal. These Pringles "cantennas" are endlessly helpful, whether you're trying to access a neighbor's wireless network or boost your own while you're out in the wild. Keep in mind that FCC guidelines do apply, even to these homemade devices. Authors of these hacks are also careful to point out that you use these devices at your own risk.
If building electronics isn't your forte, you can also purchase a WiFi antenna booster. RadioLabs has written a great overview of the different types of WiFi antennae available today. Wireless Garden Inc. makes a WiFi antenna, the "Super Cantenna," small enough to be chucked into a backpack.
For an even more powerful WiFi boost, however, satellite is the only way to go. Read on for details!