Best way to Secure wireless Network
Public Wi-Fi networks—like those in coffee shops or hotels—are not nearly as safe as you think. Even if they have a password, you're sharing a network with tons of other people, which means your data is at risk. Here's how to stay safe when you're out and about.
Chrome/Firefox: HTTPS Everywhere is a simple extension that, with just a one-click installation, …
Consider a "Safety First" Approach
If you're a real road warrior, you may find yourself adding so many profiles that automating your safe settings at every step along the way may seem like a lot of work. While most chains like Starbucks or McDonald's should have the same names for each of their Wi-Fi networks (and thus your profiles will carry over), a better approach may be to make your more secure settings the default for your system, and create just one profile for your home network. Thus, by default, file sharing would be turned off, your firewall would be at its most secure state, and so on—then, when you return home to your protected network, you can have Airport Location or NetSetMan turn your less secure settings on.
This isn't all-encompassing by any means, but should give you a good quick checklist of things you should do every time you connect to a public network. There are certainly a number of other things you could do (such as setting up a SOCKS proxy over SSH or installing these extensions), but these steps will take you a long way on the road to security when you're browsing on those public hotspots. Of course, some of you already have your own public browsing routines, so be sure to share your safe networking tips in the comments.