[Mark C]

Make sure you know the airline rules. No carry-on liquids (toothpaste, shampoo, etc. can be carried on if less than 3 oz), no lighters, nothing sharp and pointy, and don't use the word 'bomb' on the airplane. Before you get to security, empty your pockets into your carry-on bag, and if you're bringing a laptop, make sure it's accessible since you'll have to take it out of your bag. I imagine that's a fairly long flight, don't forget your iPod/headphones, and bring some snacks. Check the weather in your destination before you leave, and pack appropriately, bring a jacket or something in your carryon so you don't have to dig through your checked bags when you get to Seattle.