How do you know if you travel too much? 10. You forget where your car is parked at the airport. You're not even sure which airport. 9. The airline frequently upgrades you to "co-pilot". 8. You dial 9 even when you're at home. 7. The staff at the Marriott think you work there. 6. Your love life has gone from phone sex to fax sex. 5. You know the best restaurants in cities most people can't even spell. 4. Your picture appears on milk cartons. 3. You have conjugal visits with your wife at the airport. 2. When you return home your children ask you how long you'll be visiting. 1. Your frequent flyer level enables you to take the plane wherever you like as long as you return with a full tank of gas.