Some airports still want you to turn your computer on. Slip on shoes is the best advice. Don't lock a bag if you check anything, Doran's right - they'll pop it. Also, I'm not sure the cargo holds in a plane are pressurized, I'd keep any liquids in a carryon - you don't want to show up, unzip, and then find out your shampoo got on half your stuff. You'll have to buy your water/soda/beer after you get through security, they'll make you pour out anything that's in a bottle larger than 3 ounces.
