If you ever have a long connection through Chicago O'Hare, you'll want to go straight to Tortas Frontera for sandwiches. At San Francisco International Airport, there's a yoga room where you can decompress and stretch before your next flight. Of course, if you have the GateGuru iPhone app or the GateGuru Android app, you won't need to rely on my advice, as you'll have all these great tips and lists of services to help you navigate the world's best and worst airports.