Cheapskate Wi-Fi signal boost
If you travel on the cheap and are trying to find a free Wi-Fi hotspot to get on the internet, you might want to check out this website. Most Wi-Fi antennas are very inefficient and are designed for a short range of a few hundred feet. On the Free Antennas website, there are several templates to allow you to add inexpensive reflectors to your Wi-Fi antenna to increase the signal strength without any major electrical or structural modification of your equipment.
This is much easier to travel with than the Wifi Wok solution.